1.6.4 crash log

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

Time: 10/1/13 1:45 PM
Description: Exception in server tick loop

java.lang.IllegalAccessError: tried to access method net.minecraft.server.management.PlayerManager.func_72690_a(IIZ)Lnet/minecraft/server/management/PlayerInstance; from class codechicken.chunkloader.ChunkLoaderManager
	at codechicken.chunkloader.ChunkLoaderManager.cleanChunks(ChunkLoaderManager.java:835)
	at codechicken.chunkloader.ChunkLoaderManager.tickEnd(ChunkLoaderManager.java:860)
	at codechicken.chunkloader.ChunkLoaderEventHandler.tickEnd(ChunkLoaderEventHandler.java:39)
	at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
	at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
	at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:282)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:677)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:175)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 364214424 bytes (347 MB) / 1036517376 bytes (988 MB) up to 1908932608 bytes (1820 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
	AABB Pool Size: 5161 (289016 bytes; 0 MB) allocated, 4167 (233352 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 60
	FML: MCP v8.11 FML v6.4.20.916 Minecraft Forge 9.11.1.916 Optifine OptiFine_1.6.4_HD_U_C5 16 mods loaded, 16 mods active
	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	FML{6.4.20.916} [Forge Mod Loader] (minecraftforge-9.11.1.916.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Forge{9.11.1.916} [Minecraft Forge] (minecraftforge-9.11.1.916.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	CodeChickenCore{0.9.0.6} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	NotEnoughItems{1.6.1.5} [Not Enough Items] (NotEnoughItems 1.6.1.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	mod_bspkrsCore{v3.05(1.6.4)} [bspkrsCore] ([1.6.4]bspkrsCorev3.05.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	mod_ReiMinimap{v3.4_01 [1.6.2]} [mod_ReiMinimap] ([1.6.4]ReiMinimap_v3.4_01.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	TreeCapitator{Forge 1.6.4.r02} [Treecapitator] ([1.6.4]TreeCapitator.Forge.1.6.4.r02.Universal (1).jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	BetterGrassAndLeavesMod{1.6.4.A} [Better Grass & Leaves Mod] (BetterGrassAndLeavesMod[v1.6.4.A].jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	BiomesOPlenty{1.1.2} [Biomes O' Plenty] (BiomesOPlenty-universal-1.6.4-1.1.2.51.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	BWG4{1.1.9} [Better World Generation 4] (BWG4_V119.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	ChickenChunks{1.3.3.3} [ChickenChunks] (ChickenChunks 1.3.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	eplus{1.16.4} [Enchanting Plus] (EnchantingPlus-1.16.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	mca{3.5.1} [Minecraft Comes Alive] (MCA v3.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	millenaire{5.1.9} [Millénaire] (millenaire-jar-5.1.9) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	TLSpecialArmor{1.6.4} [SpecialArmor] (SpecialArmor_1.6.4a.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1949 (109144 bytes; 0 MB) allocated, 1845 (103320 bytes; 0 MB) used
	Player Count: 1 / 8; [EntityPlayerMP['Axamander'/282, l='lava falls modded 1.6.4', x=-349.01, y=68.00, z=-382.26]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Definitely; Client brand changed to 'fml,forge'