People Die; Disconnected, Internal Server Error

[WARNING] Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
at net.minecraft.server.ServerConfigurationManager.moveToWorld(ServerConfigurationManager.java:248)
at net.minecraft.server.ServerConfigurationManager.moveToWorld(ServerConfigurationManager.java:204)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:870)
at net.minecraft.server.Packet9Respawn.a(SourceFile:18)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:85)
at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:451)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

And it happens every time someone dies...

 

Hm... I had this Before What PLugins Do u have on your server?

 

Oh wow lets see

AutoSave,
AutoTool,
BananaLogArchiver,
BlocksOnGlass,
ChairCraft,
CommandBook,
CommandSigns,
Coupon Codes,
CustomDifficulty,
DreamLand,
Dungeon,
FalseBookBlock,
FalseBookCart,
FalseBookChat,
FalseBookCore,
FalseBookExtra,
FalseBookIC,
firstSpawn,
Giant Trees,
Graveyard,
HeroChat,
HeroicDeath,
iConomy,
Jail,
JumpBlock,
LightningGiants,
mcMMO,
MonsterBox,
Mute,
MyHome,
NoMovedTooQuicklyKick,
NSCommand,
nSpleef,
obuShutTheHellUp,
PaintingSwitch,
Parties,
Permissions,
Praecantatio,
ScrollingMenuSign,
SeattleSummer,
SimpleTips,
StyxSpace,
Tables,
TeslaCoil,
War,
WatchPM,
WorldEdit,
WorldGuard,
xAuth,
Citizens,
LWC,
NoCheat,
WormholeXTreme,
WormholeXTremeWorlds