pheonic

So I tried both of those things and for awhile it worked but now it's happening again and what previously worked doesn't anymore if anyone else has any ideas on how to fix this that would be great!

I just downloaded tekkit and the launcher today and I was trying to get it up and running but seconds after I join I get an internal server error. The server says the problem is : [WARNING] Failed to handle packet: java.lang.NullPointerException java.lang.NullPointerException at net.minecraft.server.mod_NotEnoughItems.getMobSpawnerPacket(mod_NotEn oughItems.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:7 8) 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) does anyone know of a fix for this?