20:09:31 [SEVERE] Could not pass event ENTITY_DAMAGE to ecoCreature
java.lang.NoSuchMethodError: net.minecraft.server.EntityWolf.A()Z
        at se.crafted.chrisb.ecoCreature.entities.ecoUW.isTame(ecoUW.java:44)
        at se.crafted.chrisb.ecoCreature.entities.ecoEntityListener.onEntityDamage(ecoEntityListener.java:64)
        at org.bukkit.plugin.java.JavaPluginLoader$55.execute(JavaPluginLoader.java:628)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:321)
        at net.minecraft.server.EntityWolf.a(EntityWolf.java:339)
        at net.minecraft.server.EntityCreature.c_(EntityCreature.java:64)
        at net.minecraft.server.EntityWolf.c_(EntityWolf.java:92)
        at net.minecraft.server.EntityLiving.v(EntityLiving.java:685)
        at net.minecraft.server.EntityWolf.v(EntityWolf.java:133)
        at net.minecraft.server.EntityLiving.m_(EntityLiving.java:218)
        at net.minecraft.server.EntityWolf.m_(EntityWolf.java:161)
        at net.minecraft.server.World.entityJoinedWorld(World.java:1190)
        at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:48)
        at net.minecraft.server.World.playerJoinedWorld(World.java:1172)
        at net.minecraft.server.World.cleanUp(World.java:1102)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:447)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:361)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)