Hola, quiero comentarles mi problema, tengo mi minecraft con forge optifine y los mods de meteoritos, el de el cofre de experiencia, el nei, DivineRPG y player api el problema es que hoy hice el portal al nether y al atravesarlo tras dar un par de pasos en el nether el juego me crasheo, aparecio el launcher de nuevo con este mensaje:

 

—- Minecraft Crash Report —-
// Hey, that tickles! Hehehe!

Time: 22/11/13 12:10 PM
Description: Exception in world tick

java.lang.NullPointerException
at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:281)
at net.minecraft.client.multiplayer.WorldClient.func_72835_b(WorldClient.java:99)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1930)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
A detailed walkthrough of the error, its code path and all known details is as follows:
—————————————————————————————

— Head —
Stacktrace:
at net.minecraft.client.multiplayer.NetClientHandler.func_72519_a(NetClientHandler.java:956)
at net.minecraft.network.packet.Packet24MobSpawn.func_73279_a(SourceFile:87)
at net.minecraft.network.MemoryConnection.func_74428_b(MemoryConnection.java:89)
at net.minecraft.client.multiplayer.NetClientHandler.func_72551_d(NetClientHandler.java:281)

— Affected level —
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP[‘Endermen’/187, l=’MpServer’, x=266,44, y=67,50, z=-89,76]]
Chunk stats: MultiplayerChunkCache: 15
Level seed: 0
Level generator: ID 00 – default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (228,64,240), Chunk: (at 4,4,0 in 14,15; contains blocks 224,0,240 to 239,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 780479 game time, 956226 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: 2 total; [EntityPigZombie[‘Hombre-cerdo Zombi’/395, l=’MpServer’, x=283,50, y=74,00, z=-106,50], EntityClientPlayerMP[‘Endermen’/187, l=’MpServer’, x=266,44, y=67,50, z=-89,76]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:440)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1943)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:910)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:838)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

— Affected level —
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP[‘Endermen’/187, l=’MpServer’, x=266,44, y=67,50, z=-89,76]]
Chunk stats: MultiplayerChunkCache: 15
Level seed: 0
Level generator: ID 00 – default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (228,64,240), Chunk: (at 4,4,0 in 14,15; contains blocks 224,0,240 to 239,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 780479 game time, 956226 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: 2 total; [EntityPigZombie[‘Hombre-cerdo Zombi’/395, l=’MpServer’, x=283,50, y=74,00, z=-106,50], EntityClientPlayerMP[‘Endermen’/187, l=’MpServer’, x=266,44, y=67,50, z=-89,76]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server

— 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: 264281584 bytes (252 MB) / 542638080 bytes (517 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 115 (6440 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
FML: MCP v8.11 FML v6.4.45.952 Minecraft Forge 9.11.1.952 Optifine OptiFine_1.6.4_HD_U_C4 10 mods loaded, 10 mods active
mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{6.4.45.952} [Forge Mod Loader] (minecraftforge-9.11.1.952.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{9.11.1.952} [Minecraft Forge] (minecraftforge-9.11.1.952.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
PlayerAPI{1.1} [Player API] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
DivineRPG{1.4.0 Beta!} [Divine RPG] (DivineRPG 1.6.2 Beta 5.0.0.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
ExpChest{3.1.40.–} [Exp Chest] (Exp Chest v3.1.40.–.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
meteors{2.11.2} [Falling Meteors] (Meteors Mod V2.11.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
moreplayermodels{2} [MorePlayerModels V2] (MorePlayerModels2_1.6.4.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.6.4-Forge9.11.1.952
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics GL version 2.1.0 – Build 8.15.10.2622, Intel
Is Modded: Definitely; Client brand changed to ‘fml,forge’
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: Español (México)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 120 (6720 bytes; 0 MB) allocated, 13 (728 bytes; 0 MB) used

Alguien ayudenme pues cada vez que entro a mi mundo aparezco en el nether el juego crashea y sale de nuevo ese mensaje y no quiero perder todo mi progreso porfa, de antemano gracias