Minecraft Error

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

Minecraft has stopped running because it encountered a problem; Exception in server tick loop

A full error report has been saved to C:\Users\King\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-21_14.43.52-server.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 97927bab --------
Full report at:
C:\Users\King\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-21_14.43.52-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 21.12.12 14:44

-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 229986528 bytes (219 MB) / 535298048 bytes (510 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 4194 (234864 bytes; 0 MB) allocated, 3832 (214592 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 2, tcache: 0, allocated: 3, tallocated: 71
	FML: MCP v7.25 FML v4.6.12.511 Minecraft Forge 6.5.0.467 Optifine OptiFine_1.4.6_HD_U_A2 11 mods loaded, 11 mods active
	mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	mod_CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	mod_NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	Koopinator_BetterMisc [Better Blocks & Items (Vanilla with Sprinkles)] (Better Blocks & Items (12-20) v.2.1 [Forge].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	ExtrabiomesXL [ExtrabiomesXL] (ExtrabiomesXL-universal-1.4.6-3.7.0a.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	Koopinator_FancyFences [Fancy Fences (Vanilla with Sprinkles)] (Fancy Fences (12-20) v.2.4 [Forge].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	IronChest [Iron Chest] (ironchest-universal-1.4.6-4.5.1.199.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	Map Making Tools [Map Making Tools] (Map Making Tools - 1.1.0 [1.4.6].zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	mod_Timber [Timber!] (Timber! (1.4.6).zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2924 (163744 bytes; 0 MB) allocated, 2463 (137928 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['KingMinecrafter'/8270, l='New World', x=-375,12, y=65,00, z=151,23]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'forge,fml'

java.lang.IllegalAccessError: tried to access field ans.f from class mapmakingtools.ItemSpawnerNamer
	at mapmakingtools.ItemSpawnerNamer.a(ItemSpawnerNamer.java:56)
	at ur.a(SourceFile:88)
	at ir.a(ItemInWorldManager.java:424)
	at iv.a(NetServerHandler.java:578)
	at fk.a(SourceFile:58)
	at cf.b(MemoryConnection.java:80)
	at iv.d(NetServerHandler.java:136)
	at iw.b(NetworkListenThread.java:57)
	at bec.b(IntegratedServerListenThread.java:108)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:702)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:598)
	at bdz.q(IntegratedServer.java:159)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
	at fy.run(SourceFile:849)
--- END ERROR REPORT 254edef5 ----------