Problème Minecraft 1.7.4

Bonjour, mon minecraft se lance correctement mais quand je lance un monde ou que j'en créer un, minecraft ne répond plus. Merci d'avance pour votre aide.

P.S. : j'ai déjà désinstaller et réinstaller plusieurs fois minecraft


Voici le Crash Report:

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 08/02/14 17:42
Description: Starting integrated server

java.lang.ExceptionInInitializerError
at net.minecraft.server.MinecraftServer.<init>(SourceFile:117)
at cbr.<init>(SourceFile:32)
at bdh.a(SourceFile:1668)
at bfr.a(SourceFile:205)
at bgm.a(SourceFile:180)
at bfr.a(SourceFile:310)
at bgm.d(SourceFile:242)
at bgm.k(SourceFile:219)
at bdh.p(SourceFile:1356)
at bdh.ag(SourceFile:778)
at bdh.f(SourceFile:732)
at net.minecraft.client.main.Main.main(SourceFile:154)
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 od.<clinit>(SourceFile:32)
... 12 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)
... 16 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)
... 19 more
Caused by: java.net.ConnectException: Connection timed out: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at java.nio.channels.SocketChannel.open(Unknown Source)
... 28 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>(SourceFile:117)
at cbr.<init>(SourceFile:32)

-- Starting integrated server --
Details:
Level ID: Nouveau monde---
Level Name: Nouveau monde
Stacktrace:
at bdh.a(SourceFile:1668)
at bfr.a(SourceFile:205)
at bgm.a(SourceFile:180)
at bfr.a(SourceFile:310)
at bgm.d(SourceFile:242)
at bgm.k(SourceFile:219)

-- Affected screen --
Details:
Screen name: bgx
Stacktrace:
at bdh.p(SourceFile:1356)
at bdh.ag(SourceFile:778)
at bdh.f(SourceFile:732)
at net.minecraft.client.main.Main.main(SourceFile:154)

-- System Details --
Details:
Minecraft Version: 14w06b
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 223132696 bytes (212 MB) / 261095424 bytes (249 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 14w06b
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics Family GL version 3.1.0 - Build 8.15.10.2622, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: Français (France)
Profiler Position: N/A (disabled)
Anisotropic Filtering: Off (1)