Salut,depuis pas longtemps j'ai changé de PC j'ai donc remis minecraft et forge mais dés que je lance minecraft sous forge en 1.7.2 rien ne se passe,j'appuie sur "Play" puis rien ne se passe.
J'ai cherché sur de nombreux forum et la solution était de mettre java7 je l'ai mis et rien à faire.
Par contre avec Minecraft Forge 1.8 et 1.6.4 sa marche trés bien.
Voila voila si quelqun peut m'aider...

Les logs de ton démarrage stp.

12:21:01 INFO]: Refreshing remote version list...
[12:21:04 INFO]: Refresh complete.
[12:21:04 INFO]: Loaded 3 profile(s); selected 'destroyeur299'
[12:21:04 INFO]: Refreshing auth...
[12:21:04 INFO]: Logging in with access token
[12:21:37 INFO]: Getting syncinfo for selected version
[12:21:37 INFO]: Queueing library & version downloads
[12:21:37 INFO]: Download job 'Version & Libraries' started (16 threads, 27 files)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries'... (try 0)
[12:21:37 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)

Le reste des logs stp ils ne sont pas complet là, enfin je pense

13:45:49 INFO]: Minecraft Launcher 1.6.11 (through bootstrap 100) started on windows...
[13:45:49 INFO]: Current time is Feb 15, 2015 1:45:49 PM
[13:45:49 INFO]: System.getProperty('os.name') == 'Windows 7'
[13:45:49 INFO]: System.getProperty('os.version') == '6.1'
[13:45:49 INFO]: System.getProperty('os.arch') == 'amd64'
[13:45:49 INFO]: System.getProperty('java.version') == '1.8.0_25'
[13:45:49 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[13:45:49 INFO]: System.getProperty('sun.arch.data.model') == '64'
[13:45:49 INFO]: proxy == DIRECT
[13:45:50 INFO]: JFX is already initialized
[13:45:50 INFO]: Refreshing local version list...
[13:45:51 INFO]: Refreshing remote version list...
[13:45:53 INFO]: Refresh complete.
[13:45:53 INFO]: Loaded 3 profile(s); selected 'destroyeur299'
[13:45:53 INFO]: Refreshing auth...
[13:45:53 INFO]: Logging in with access token
[13:46:44 INFO]: Getting syncinfo for selected version
[13:46:44 INFO]: Queueing library & version downloads
[13:46:44 INFO]: Download job 'Version & Libraries' started (16 threads, 27 files)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries'... (try 0)
[13:46:44 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Download job 'Resources' skipped as there are no files to download
[13:46:46 INFO]: Job 'Resources' finished successfully (took 0:00:00.000)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\minecraft\launchwrapper\1.9\launchwrapper-1.9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.0\lwjgl-2.9.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.0\lwjgl_util-2.9.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Attempting to download C:\Users\ra\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar for job 'Version & Libraries'... (try 0)
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.0\lwjgl-platform-2.9.0-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\org\ow2\asm\asm-all\4.1\asm-all-4.1.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:46 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar for job 'Version & Libraries': Local file matches local checksum, using that
[13:46:47 INFO]: Finished downloading C:\Users\ra\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147.jar for job 'Version & Libraries': Couldn't connect to server (responded with 403) but have local file, assuming it's good
[13:46:47 INFO]: Job 'Version & Libraries' finished successfully (took 0:00:02.534)
[13:46:47 INFO]: Launching game
[13:46:47 INFO]: Unpacking natives to C:\Users\ra\AppData\Roaming\.minecraft\versions\1.7.2-Forge10.12.2.1147\1.7.2-Forge10.12.2.1147-natives-14575086794183
[13:46:47 INFO]: Reconstructing virtual assets folder at C:\Users\ra\AppData\Roaming\.minecraft\assets\virtual\legacy

je pense avoir tous mis la.

Ya vraiment rien après ?

non je suis allez vérifier