Server Crash please help!

[tommi_99]

Hello Everyone outside there,

I have just made a tekkit server, but when i join i get on the server this crash log:

2012-03-31 08:09:14 [WARNING] Failed to handle packet: java.lang.NullPointerException

java.lang.NullPointerException

at net.minecraft.server.mod_NotEnoughItems.getMobSpawnerPacket(mod_NotEnoughItems.java:571)

at net.minecraft.server.TileEntityMobSpawner.k(TileEntityMobSpawner.java:114)

at net.minecraft.server.EntityPlayer.a(EntityPlayer.java:360)

at net.minecraft.server.EntityPlayer.a(EntityPlayer.java:259)

at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:324)

at net.minecraft.server.Packet10Flying.handle(SourceFile:126)

at net.minecraft.server.NetworkManager.b(NetworkManager.java:231)

at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:101)

at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)

at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:543)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

I have disabled NotEnoughItems, but i can´t enable it again!

I use Tekkit 2.1.1.