[Resolvido][Em andamento] erro no minecraft

Gente, estou com um erro, tipo, meu minecraft ta dando um erro,eu tento entrar no servidor mais ele entra tipo em uma mensagem e nao tem como voltar, tem que volta, vou ta deichando o texto que ele passa.

[/spoiler]



Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Ticking screen

A full error report has been saved to C:\craftlandia antihack\data\.minecraft\crash-reports\crash-2012-11-17_22.16.24-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT 52a7d137 --------
Full report at:
C:\craftlandia antihack\data\.minecraft\crash-reports\crash-2012-11-17_22.16.24-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 17/11/12 22:16

-- Head --
Stacktrace:
at axz.a(NetClientHandler.java:673)
at cv.a(SourceFile:44)
at cg.b(SourceFile:349)
at axz.d(NetClientHandler.java:90)
at ayc.c(SourceFile:69)

-- Affected screen --
Details:
Screen name: aym

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ayk['Gustavinhol'/32639, l='MpServer', x=8,50, y=66,62, z=8,50]]
Chunk stats: MultiplayerChunkCache: 0
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (3,66,224), Chunk: (at 3,4,0 in 0,14; contains blocks 0,0,224 to 15,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 211275300 game time, 211309900 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 1 total; [ayk['Gustavinhol'/32639, l='MpServer', x=8,50, y=66,62, z=8,50]]
Retry entities: 0 total; []
Stacktrace:
at ayh.a(SourceFile:290)
at net.minecraft.client.Minecraft.b(SourceFile:1870)
at net.minecraft.client.Minecraft.run(SourceFile:543)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.4
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 39141080 bytes (37 MB) / 67649536 bytes (64 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 1 total; -Xmx1024m
AABB Pool Size: 1 (56 bytes; 0 MB) allocated, 1 (56 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdaterThreaded, ...[reifnsk.minimap.ReiMinimap, GuiScreenInterface, GuiOptionScreen, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: ATI Radeon X1200 Series GL version 2.1.8545 Release, ATI Technologies Inc.
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

java.lang.NoSuchFieldError: m11
at axz.a(NetClientHandler.java:673)
at cv.a(SourceFile:44)
at cg.b(SourceFile:349)
at axz.d(NetClientHandler.java:90)
at ayc.c(SourceFile:69)
at net.minecraft.client.Minecraft.l(SourceFile:1112)
at net.minecraft.client.Minecraft.J(SourceFile:582)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 6a13c4b1 ----------