2013-06-11 18:23:43 [SEVERE] Could not pass event EntityDamageByEntityEvent to MobArena v0.94.4.97
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:39)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:464)
	at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:89)
	at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:377)
	at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:402)
	at net.minecraft.server.v1_5_R3.EntityLiving.damageEntity(EntityLiving.java:681)
	at net.minecraft.server.v1_5_R3.EntityMonster.damageEntity(EntityMonster.java:39)
	at net.minecraft.server.v1_5_R3.EntityWolf.m(EntityWolf.java:185)
	at net.minecraft.server.v1_5_R3.PathfinderGoalMeleeAttack.e(PathfinderGoalMeleeAttack.java:83)
	at net.minecraft.server.v1_5_R3.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
	at net.minecraft.server.v1_5_R3.EntityLiving.bo(EntityLiving.java:1518)
	at net.minecraft.server.v1_5_R3.EntityLiving.c(EntityLiving.java:1304)
	at net.minecraft.server.v1_5_R3.EntityAgeable.c(EntityAgeable.java:72)
	at net.minecraft.server.v1_5_R3.EntityAnimal.c(SourceFile:30)
	at net.minecraft.server.v1_5_R3.EntityWolf.c(EntityWolf.java:104)
	at net.minecraft.server.v1_5_R3.EntityLiving.l_(EntityLiving.java:528)
	at net.minecraft.server.v1_5_R3.EntityWolf.l_(EntityWolf.java:114)
	at net.minecraft.server.v1_5_R3.World.entityJoinedWorld(World.java:1456)
	at net.minecraft.server.v1_5_R3.WorldServer.entityJoinedWorld(WorldServer.java:646)
	at net.minecraft.server.v1_5_R3.World.playerJoinedWorld(World.java:1432)
	at net.minecraft.server.v1_5_R3.World.tickEntities(World.java:1304)
	at net.minecraft.server.v1_5_R3.WorldServer.tickEntities(WorldServer.java:512)
	at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:562)
	at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:472)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:404)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException
	at com.garbagemule.MobArena.ArenaListener.onMonsterDamage(ArenaListener.java:560)
	at com.garbagemule.MobArena.ArenaListener.onEntityDamage(ArenaListener.java:504)
	at com.garbagemule.MobArena.listeners.MAGlobalListener.entityDamage(MAGlobalListener.java:137)
	at sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 29 more