Bonjours, j'ai crée un mod moi même (à l'aide d'un tuto) ^^
Et je lance mon serveur (j'ai fait le gradlew build...)
Et ça me met un crash comme ça...
---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 22/07/14 14:06
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: com.xpierro.firefight.lib.ProxyCommon
at cpw.mods.fml.common.ProxyInjector.inject(ProxyInje

ctor.java:76)

at cpw.mods.fml.common.FMLModContainer.constructMod(F

MLModContainer.java:492)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ

e
Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow

n
Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un

known
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEven

t(EventHandler.java:74)

at com.google.common.eventbus.SynchronizedEventHandle

r.handleEvent(SynchronizedEventHandler.java:47)

at com.google.common.eventbus.EventBus.dispatch(Event

Bus.java:314)

at com.google.common.eventbus.EventBus.dispatchQueued

Events(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.

java:267)

at cpw.mods.fml.common.LoadController.sendEventToModC

ontainer(LoadController.java:208)

at cpw.mods.fml.common.LoadController.propogateStateM

essage(LoadController.java:187)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ

e
Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknow

n
Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Un

known
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventHandler.handleEven

t(EventHandler.java:74)

at com.google.common.eventbus.SynchronizedEventHandle

r.handleEvent(SynchronizedEventHandler.java:47)

at com.google.common.eventbus.EventBus.dispatch(Event

Bus.java:314)

at com.google.common.eventbus.EventBus.dispatchQueued

Events(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.

java:267)

at cpw.mods.fml.common.LoadController.distributeState

Message(LoadController.java:118)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:49

1)

at cpw.mods.fml.server.FMLServerHandler.beginServerLo

ading(FMLServerHandler.java:87)

at cpw.mods.fml.common.FMLCommonHandler.onServerStart

(FMLCommonHandler.java:313)

at net.minecraft.server.dedicated.DedicatedServer.fun

c_71197_b(DedicatedServer.java:166)

at net.minecraft.server.MinecraftServer.run(Minecraft

Server.java:607)

at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.xpierro.firefight.lib.ProxyCommon
at net.minecraft.launchwrapper.LaunchClassLoader.find

Class(LaunchClassLoader.java:188)

at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at cpw.mods.fml.common.ModClassLoader.loadClass(ModCl

assLoader.java:58)

at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.ProxyInjector.inject(ProxyInje

ctor.java:59)

... 28 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.find

Class(LaunchClassLoader.java:180)

... 34 more

A detailed walkthrough of the error, its code path and all known details is as follows:
--------------------------------------------------

-------------------------------------

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Linux (amd64) version 3.10.23-xxxx-std-ipv6-64
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 17637216 bytes (16 MB) / 143458304 bytes (136 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 3 total; -Xmx2048M -Xms10M -XX:MaxPermSize=2048m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.03 FML v7.2.217.1147 Minecraft Forge 10.12.2.1147 4 mods loaded, 4 mods active
mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
FML{7.2.217.1147} [Forge Mod Loader] (minecraft_server.jar) Unloaded->Constructed
Forge{10.12.2.1147} [Minecraft Forge] (minecraft_server.jar) Unloaded->Constructed
firefight{1.0} [firefight] (modid-1.0.jar) Unloaded->Errored
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'cauldron,craftbukkit,mcpc,fml,forge'
Type: Dedicated Server (map_server.txt)
Merci de m'aider ^^'