Salut a tous,

Voilà j'ai installer le pack de mods FTB et quand je le lance j'ai une erreur qui s'affiche dans la consol:

[15:58:54] [INFO] LaunchFrame.main:165: FTBLaunch starting up (version 1.2.3)
[15:58:54] [INFO] LaunchFrame.main:166: Java version: 1.7.0_21
[15:58:54] [INFO] LaunchFrame.main:167: Java vendor: Oracle Corporation
[15:58:54] [INFO] LaunchFrame.main:168: Java home: C:\Program Files\Java\jre7
[15:58:54] [INFO] LaunchFrame.main:169: Java specification: Java Virtual Machine Specification version: 1.7 by Oracle Corporation
[15:58:54] [INFO] LaunchFrame.main:171: Java vm: Java HotSpot(TM) Client VM version: 23.21-b01 by Oracle Corporation
[15:58:54] [INFO] LaunchFrame.main:172: OS: x86 Windows XP 5.1
[15:58:54] [INFO] I18N.setLocale:161: [i18n] enUS English language file loaded!
[15:58:54] [INFO] LocaleUpdater.run:67: [i18n] Checking for updates ...
[15:58:55] [INFO] JGoogleAnalyticsTracker$2.run:483: AnalyticsBackgroundThread started
[15:58:56] [INFO] OptionsPane.<init>:160: [i18n] Added 0 enUS to options pane
[15:58:56] [INFO] I18N.setLocale:161: [i18n] enUS English language file loaded!
[15:58:56] [INFO] LocaleUpdater.run:80: [i18n] remoteVer = 10
[15:58:56] [INFO] LocaleUpdater.run:93: [i18n] localVer = 10
[15:58:56] [INFO] LocaleUpdater.run:98: [i18n] Files are up to date
[15:58:56] [INFO] I18N.addFiles:118: [i18n] Fallback enUS loaded
[15:58:57] [INFO] ModpackLoader.run:59: Loading modpack information for modpacks.xml...
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 1
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 2
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 3
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 4
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 5
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 6
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 7
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 8
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 9
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 10
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 11
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 12
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 13
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 14
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 15
[15:58:57] [INFO] ModPackListModelAdapter.onModPackAdded:106: Adding pack 16
[15:58:57] [INFO] MapLoader.run:40: loading map information...
[15:58:57] [INFO] TexturePackLoader.run:40: loading texture pack information...
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 1
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 2
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 3
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 4
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 5
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 6
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 7
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 8
[15:58:58] [INFO] MapListModelAdapter.onMapAdded:109: Adding map 9
[15:58:59] [INFO] TexturePackListModelAdapter.onTexturePackAdded:109
:
Adding texture pack 1
[15:58:59] [INFO] TexturePackListModelAdapter.onTexturePackAdded:109
:
Adding texture pack 2
[15:58:59] [INFO] TexturePackListModelAdapter.onTexturePackAdded:109
:
Adding texture pack 3
[15:58:59] [INFO] LaunchFrame.doLogin:533: Logging in...
[15:59:01] [INFO] LaunchFrame$13.done:592: Login complete.
[15:59:01] [INFO] LaunchFrame.initializeMods:868: Ultimate
[15:59:01] [INFO] ModManager.upToDate:227: Modpack is up to date.
[15:59:01] [INFO] LaunchFrame.installMods:718: dirs mk'd
[15:59:02] [INFO] MinecraftVersionDetector.shouldUpdate:85: Current: 1.4.7
[15:59:02] [INFO] MinecraftVersionDetector.shouldUpdate:86: Required: 1.4.7
[15:59:02] [INFO] MinecraftLauncher.setMemory:118: Setting MinMemory to 256
[15:59:02] [INFO] MinecraftLauncher.setMemory:120: Setting MaxMemory to 1024
Loading jars...
Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/instMods/liteload
er.zip

Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/instMods/Minecraf
tForge.zip

Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/minecraft/bin/min
ecraft.jar

Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/minecraft/bin/lwj
gl.jar

Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/minecraft/bin/lwj
gl_util.jar

Added URL to classpath: file:/C:/Documents%20and%20Settings/HP_Administrat
eur/Mes%20documents/ftb/Ultimate/minecraft/bin/jin
put.jar

Loading natives...
Natives loaded...
Loading minecraft class
mc = class net.minecraft.client.Minecraft
[15:59:03] [ERROR] ClassLoader.checkCerts:-1->MinecraftLauncher.main:
214:
Unhandled error launching minecraft: java.lang.SecurityException: class "md"'s signer information does not match signer information of other classes in the same package
java.lang.ClassLoader.checkCerts(Unknown Source)
java.lang.ClassLoader.preDefineClass(Unknown Source)
java.lang.ClassLoader.defineClass(Unknown Source)
java.security.SecureClassLoader.defineClass(Unknow
n
Source)
java.net.URLClassLoader.defineClass(Unknown Source)
java.net.URLClassLoader.access$100(Unknown Source)
java.net.URLClassLoader$1.run(Unknown Source)
java.net.URLClassLoader$1.run(Unknown Source)
java.security.AccessController.doPrivileged(Native

Method)
java.net.URLClassLoader.findClass(Unknown Source)
java.lang.ClassLoader.loadClass(Unknown Source)
sun.misc.Launcher$AppClassLoader.loadClass(Unknown

Source)
java.lang.ClassLoader.loadClass(Unknown Source)
java.lang.Class.getDeclaredFields0(Native Method)
java.lang.Class.privateGetDeclaredFields(Unknown Source)
java.lang.Class.getDeclaredFields(Unknown Source)
net.ftb.mclauncher.MinecraftLauncher.main(Minecraf
tLauncher.java:182)

Voilà ce qu'il y a dans ma consol si quelqu'un peut m'aider se serais super cool...

OMG personne va lire ce pavé

Moi j'ai lu, mais je suis pas connaisseur java donc j'ai rien compris

Enfin l'erreur commence ici:

Loading natives...
Natives loaded...
Loading minecraft class
mc = class net.minecraft.client.Minecraft
[15:59:03] [ERROR] ClassLoader.checkCerts:-1->MinecraftLauncher.main:

...

T'a essayer d'effacer/reinstaller le tout?

yep et tjr pareille