NEI: Server kicks player 1-3 seconds after join

[unknownPWNAGE97]

Launcher/pack Version: Technic Launcher 2.1.0 (1.1) Recommended Build

Operating System: Windows 7 Home Premium 64-Bit

Version of Java: Version 7 Update 3 (build 1.7.0_03-b05)

Description of Problem: NEI seems to be causing a problem when a player (myself and my friend) joins. I'll get an error in the console concerning some mob spawner problem... derp. In-game, as the player is kicked, they get a "Internal Server" error, referring to NEI. I tried disabling NEI both in the Modloader config for the tekkit server as well as in the Tekkit folder in .techniclauncher. I have looked through the last few pages and have not seen anything that seems to cover my problem. I hope I have covered enough information. Has anyone encountered the same problem as I am experiencing currently?

Error Messages: (appears several seconds after someone joins and shows the mods they have installed.)

20:36:03 [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)

Link to pastebin of log: http://pastebin.com/hfqSfV4c