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I tried to download Optifine, and I extracted the contents of the file into the minecraft.jar folder in WinRAR


now when I try to run minecraft, I get this when I try to go on my server



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

Minecraft has stopped running because it encountered a problem; Exception in server tick loop
This error has been saved to C:\Users\removedAppData\Roaming\.minecraft\crash-reports\crash-2012-10-11_13.55.32-server.txt for your convenience. Please include a copy of this file if you report this crash to anyone.



--- BEGIN ERROR REPORT 15fac41f --------
Generated 10/11/12 1:55 PM

- Minecraft Version: 1.3.2
- Operating System: Windows 7 (x86) version 6.1
- Java Version: 1.7.0_04, Oracle Corporation
- Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
- Memory: 888957552 bytes (847 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
- JVM Flags: 2 total; -Xms1024m -Xmx1024m
- ModLoader: Mods loaded: 3
ModLoader 1.3.2
mod_ReiMinimap v3.2_05 [1.3.2]
mod_SpawnerGUI 1.3.2

- Is Modded: Very likely
- Profiler Position: N/A (disabled)
- Player Count: 1 / 8; [gu['Aiiight'/339, l='It's an Aiiight World', x=-193.29, y=71.00, z=259.03]]
- World It's an Aiiight World Entities: 0 total; []
- World It's an Aiiight World Players: 0 total; []
- World It's an Aiiight World Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Integrated Server

java.lang.NoSuchFieldError: aG
at og.d(EntityPlayer.java:486)
at jw.h_(EntityLiving.java:688)
at og.h_(EntityPlayer.java:262)
at gu.g(EntityPlayerMP.java:261)
at gz.d(NetServerHandler.java:97)
at ha.b(SourceFile:35)
at axy.b(SourceFile:83)
at net.minecraft.server.MinecraftServer.q(SourceFile:452)
at net.minecraft.server.MinecraftServer.p(SourceFile:383)
at axv.p(IntegratedServer.java:122)
at net.minecraft.server.MinecraftServer.run(SourceFile:316)
at ep.run(SourceFile:539)
--- END ERROR REPORT 8276de89 ----------