error

2013-08-24 01:48:17 [SEVERE] Could not pass event EntityExplodeEvent to LWC v4.4.0 (b881) (July 11, 2013)
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 net.minecraft.server.v1_6_R2.Explosion.a(Explosion.java:220)
	at net.minecraft.server.v1_6_R2.World.createExplosion(World.java:1770)
	at net.minecraft.server.v1_6_R2.WorldServer.createExplosion(WorldServer.java:846)
	at net.minecraft.server.v1_6_R2.EntityCreeper.l_(EntityCreeper.java:102)
	at net.minecraft.server.v1_6_R2.World.entityJoinedWorld(World.java:1492)
	at net.minecraft.server.v1_6_R2.World.playerJoinedWorld(World.java:1467)
	at net.minecraft.server.v1_6_R2.World.tickEntities(World.java:1336)
	at net.minecraft.server.v1_6_R2.WorldServer.tickEntities(WorldServer.java:517)
	at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:571)
	at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:239)
	at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:481)
	at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:413)
	at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NoSuchMethodError: com.nitnelave.CreeperHeal.config.CreeperConfig.loadWorld(Lorg/bukkit/World;)Lcom/nitnelave/CreeperHeal/config/WorldConfig;
	at com.griefcraft.listeners.LWCEntityListener.isCreeperHealActive(LWCEntityListener.java:133)
	at com.griefcraft.listeners.LWCEntityListener.onEntityExplode(LWCEntityListener.java:108)
	at sun.reflect.GeneratedMethodAccessor461.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)