Windows .exe Server Crash

[Kinge]

Hello,

I have made a server but when ever I connect it loads like five or six chunks the it crashes. Here is the crash report.

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 11/20/12 9:50 AM
Description: Exception in server tick loop

java.lang.ArrayIndexOutOfBoundsException: 4
at qa.bD(SourceFile:261)
at xr.a(SpawnerAnimals.java:233)
at xr.a(SpawnerAnimals.java:170)
at ie.b(WorldServer.java:116)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:648)
at hg.r(DedicatedServer.java:241)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:585)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:492)
at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.7.0_01, Oracle Corporation
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
- Memory: 1305796224 bytes (1245 MB) / 1406402560 bytes (1341 MB) up to 2863333376 bytes (2730 MB)
- JVM Flags: 2 total; -Xms512M -Xmx3G
- AABB Pool Size: 2143 (120008 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
- FML: ~ERROR~ NullPointerException: null
- Is Modded: Definitely; 'forge,fml'
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 2807 (157192 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
- Player Count: 1 / 6; [ih['hraabepex'/198, l='FTB-Beta-A', x=124.50, y=65.62, z=-192.50]]
- World FTB-Beta-A Entities: 0 total; []
- World FTB-Beta-A Players: 0 total; []
- World FTB-Beta-A Chunk Stats: ServerChunkCache: 0 Drop: 0
- Type: Dedicated Server

 

[Ashzification]

You should probably check out server tech support for a good solution