Forge 1.7.2 fait crasher

re :) voici un message d'erreur au passage que je viens d'avoir :

--- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 08.04.14 16:09
Description: Starting integrated server

java.lang.ExceptionInInitializerError
at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:159)
at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:46)
at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2088)
at cpw.mods.fml.client.FMLClientHandler.launchIntegratedServerCallback(FMLClientHandler.java:597)
at cpw.mods.fml.client.FMLClientHandler.tryLoadExistingWorld(FMLClientHandler.java:591)
at net.minecraft.client.gui.GuiSelectWorld.func_146615_e(GuiSelectWorld.java:184)
at net.minecraft.client.gui.GuiSelectWorld$List.func_148144_a(GuiSelectWorld.java:260)
at net.minecraft.client.gui.GuiSlot.func_148128_a(GuiSlot.java:229)
at net.minecraft.client.gui.GuiSelectWorld.func_73863_a(GuiSelectWorld.java:218)
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1109)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:981)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:870)
at net.minecraft.client.main.Main.main(SourceFile:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.IllegalStateException: failed to create a child event loop
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
at net.minecraft.network.NetworkSystem.<clinit>(NetworkSystem.java:47)
... 19 more
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)
... 23 more
Caused by: java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(Unknown Source)
at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
at java.nio.channels.Pipe.open(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
... 26 more
Caused by: java.io.IOException: Une connexion existante a dû être fermée par l'hôte distant
at sun.nio.ch.SocketDispatcher.write0(Native Method)
at sun.nio.ch.SocketDispatcher.write(Unknown Source)
at sun.nio.ch.IOUtil.writeFromNativeBuffer(Unknown Source)
at sun.nio.ch.IOUtil.write(Unknown Source)
at sun.nio.ch.SocketChannelImpl.write(Unknown Source)
... 35 more

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

-- Head --
Stacktrace:
at net.minecraft.server.MinecraftServer.<init>(MinecraftServer.java:159)
at net.minecraft.server.integrated.IntegratedServer.<init>(IntegratedServer.java:46)

-- Starting integrated server --
Details:
Level ID: back
Level Name: back
Stacktrace:
at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2088)
at cpw.mods.fml.client.FMLClientHandler.launchIntegratedServerCallback(FMLClientHandler.java:597)
at cpw.mods.fml.client.FMLClientHandler.tryLoadExistingWorld(FMLClientHandler.java:591)
at net.minecraft.client.gui.GuiSelectWorld.func_146615_e(GuiSelectWorld.java:184)
at net.minecraft.client.gui.GuiSelectWorld$List.func_148144_a(GuiSelectWorld.java:260)
at net.minecraft.client.gui.GuiSlot.func_148128_a(GuiSlot.java:229)
at net.minecraft.client.gui.GuiSelectWorld.func_73863_a(GuiSelectWorld.java:218)

-- Screen render details --
Details:
Screen name: net.minecraft.client.gui.GuiMainMenu
Mouse location: Scaled: (180, 81). Absolute: (360, 316)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1109)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:981)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:870)
at net.minecraft.client.main.Main.main(SourceFile:103)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 104799336 bytes (99 MB) / 195137536 bytes (186 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
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 v9.01-pre FML v7.2.116.1024 Minecraft Forge 10.12.0.1024 3 mods loaded, 3 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML{7.2.116.1024} [Forge Mod Loader] (forge-1.7.2-10.12.0.1024.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge{10.12.0.1024} [Minecraft Forge] (forge-1.7.2-10.12.0.1024.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Launched Version: 1.7.2-Forge10.12.0.1024
LWJGL: 2.9.0
OpenGL: GeForce GT 320/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: Français (France)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
Anisotropic Filtering: Off (1)

Voila...