Error

2013-07-05 18:44:31 [SEVERE] Could not pass event CreatureSpawnEvent to Multiverse-Core v2.4-b527
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:30)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:463)
	at org.bukkit.craftbukkit.v1_6_R1.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:257)
	at net.minecraft.server.v1_6_R1.World.addEntity(World.java:955)
	at net.minecraft.server.v1_6_R1.PathfinderGoalBreed.g(PathfinderGoalBreed.java:78)
	at net.minecraft.server.v1_6_R1.PathfinderGoalBreed.e(PathfinderGoalBreed.java:45)
	at net.minecraft.server.v1_6_R1.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
	at net.minecraft.server.v1_6_R1.EntityInsentient.be(EntityInsentient.java:418)
	at net.minecraft.server.v1_6_R1.EntityLiving.c(EntityLiving.java:1397)
	at net.minecraft.server.v1_6_R1.EntityInsentient.c(EntityInsentient.java:305)
	at net.minecraft.server.v1_6_R1.EntityAgeable.c(EntityAgeable.java:112)
	at net.minecraft.server.v1_6_R1.EntityAnimal.c(SourceFile:32)
	at net.minecraft.server.v1_6_R1.EntityHorse.c(EntityHorse.java:686)
	at net.minecraft.server.v1_6_R1.EntityLiving.l_(EntityLiving.java:1260)
	at net.minecraft.server.v1_6_R1.EntityInsentient.l_(EntityInsentient.java:147)
	at net.minecraft.server.v1_6_R1.EntityHorse.l_(EntityHorse.java:714)
	at net.minecraft.server.v1_6_R1.World.entityJoinedWorld(World.java:1457)
	at net.minecraft.server.v1_6_R1.World.playerJoinedWorld(World.java:1432)
	at net.minecraft.server.v1_6_R1.World.tickEntities(World.java:1304)
	at net.minecraft.server.v1_6_R1.WorldServer.tickEntities(WorldServer.java:517)
	at net.minecraft.server.v1_6_R1.MinecraftServer.t(MinecraftServer.java:571)
	at net.minecraft.server.v1_6_R1.DedicatedServer.t(DedicatedServer.java:235)
	at net.minecraft.server.v1_6_R1.MinecraftServer.s(MinecraftServer.java:481)
	at net.minecraft.server.v1_6_R1.MinecraftServer.run(MinecraftServer.java:413)
	at net.minecraft.server.v1_6_R1.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NullPointerException
	at com.onarandombox.MultiverseCore.listeners.MVEntityListener.creatureSpawn(MVEntityListener.java:117)
	at sun.reflect.GeneratedMethodAccessor37.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)
	... 27 more