Help Bukkit issue

Caused by: java.lang.NoSuchMethodError: org.bukkit.event.entity.EntityChangeBlockEvent.getEntity()Lorg/bukkit/entity/LivingEntity;
at com.sk89q.worldguard.bukkit.WorldGuardEntityListener.onEndermanPickup(WorldGuardEntityListener.java:771)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.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)
... 24 more
2013-01-01 10:26:32 [SEVERE] Could not pass event EntityChangeBlockEvent to WorldGuard v5.5.3
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.callEntityChangeBlockEvent(CraftEventFactory.java:459)
at org.bukkit.craftbukkit.v1_4_6.event.CraftEventFactory.callEntityChangeBlockEvent(CraftEventFactory.java:443)
at net.minecraft.server.v1_4_6.PathfinderGoalEatTile.e(PathfinderGoalEatTile.java:67)
at net.minecraft.server.v1_4_6.PathfinderGoalSelector.a(PathfinderGoalSelector.java:104)
at net.minecraft.server.v1_4_6.EntityLiving.bl(EntityLiving.java:1476)
at net.minecraft.server.v1_4_6.EntitySheep.bl(EntitySheep.java:44)
at net.minecraft.server.v1_4_6.EntityLiving.c(EntityLiving.java:1273)
at net.minecraft.server.v1_4_6.EntityAgeable.c(EntityAgeable.java:64)
at net.minecraft.server.v1_4_6.EntityAnimal.c(SourceFile:33)
at net.minecraft.server.v1_4_6.EntitySheep.c(EntitySheep.java:52)
at net.minecraft.server.v1_4_6.EntityLiving.j_(EntityLiving.java:534)
at net.minecraft.server.v1_4_6.World.entityJoinedWorld(World.java:1334)
at net.minecraft.server.v1_4_6.WorldServer.entityJoinedWorld(WorldServer.java:548)
at net.minecraft.server.v1_4_6.World.playerJoinedWorld(World.java:1315)
at net.minecraft.server.v1_4_6.World.tickEntities(World.java:1193)
at net.minecraft.server.v1_4_6.WorldServer.tickEntities(WorldServer.java:445)
at net.minecraft.server.v1_4_6.MinecraftServer.r(MinecraftServer.java:580)
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.NoSuchMethodError: org.bukkit.event.entity.EntityChangeBlockEvent.getEntity()Lorg/bukkit/entity/LivingEntity;
at com.sk89q.worldguard.bukkit.WorldGuardEntityListener.onEndermanPickup(WorldGuardEntityListener.java:771)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.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)
... 24 more
2013-01-01 10:31:16 [INFO] GroupManager - INFO - Data files refreshed.

I keep getting the same thing over and over.. please help.. even when I take the world out and start a new world same thing happens.. I think its java but im not sure

 

Update the plugin that's causing it. The name is literally in the error

 

I have updated all plugins. still getting same thing. what plug in is it ill just remove? PLease

 

It is WorldGuard

 

http://forums.bukkit.org/threads/plugin-errors.120011/