2012-12-26 21:05:35 [SEVERE] Could not pass event CreatureSpawnEvent to More-Mobs v1.6.0
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.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at org.bukkit.craftbukkit.v1_4_6.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:227)
	at net.minecraft.server.v1_4_6.World.addEntity(World.java:903)
	at net.minecraft.server.v1_4_6.SpawnerCreature.spawnEntities(SpawnerCreature.java:158)
	at net.minecraft.server.v1_4_6.WorldServer.doTick(WorldServer.java:157)
	at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:572)
	at net.minecraft.server.v1_4_6.DedicatedServer.r(DedicatedServer.java:224)
	at net.minecraft.server.v1_4_6.MinecraftServer.q(MinecraftServer.java:494)
	at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/inventory/CraftItemStack
	at com.dibujaron.MoreMobs.MoreMobs.onMobSpawn(MoreMobs.java:84)
	at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 12 more
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.inventory.CraftItemStack
	at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 17 more