[SEVERE] Could not pass event EntityTargetEvent to MobRider v0.47.2-b155
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:35)
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
        at org.bukkit.craftbukkit.v1_4_5.event.CraftEventFactory.callEntityTargetEvent(CraftEventFactory.java:469)
        at net.minecraft.server.v1_4_5.EntityExperienceOrb.j_(EntityExperienceOrb.java:72)
        at net.minecraft.server.v1_4_5.World.entityJoinedWorld(World.java:1333)
        at net.minecraft.server.v1_4_5.WorldServer.entityJoinedWorld(WorldServer.java:546)
        at net.minecraft.server.v1_4_5.World.playerJoinedWorld(World.java:1315)
        at net.minecraft.server.v1_4_5.World.tickEntities(World.java:1193)
        at net.minecraft.server.v1_4_5.WorldServer.tickEntities(WorldServer.java:444)
        at net.minecraft.server.v1_4_5.MinecraftServer.r(MinecraftServer.java:579)
        at net.minecraft.server.v1_4_5.DedicatedServer.r(DedicatedServer.java:222)
        at net.minecraft.server.v1_4_5.MinecraftServer.q(MinecraftServer.java:493)
        at net.minecraft.server.v1_4_5.MinecraftServer.run(MinecraftServer.java:426)
        at net.minecraft.server.v1_4_5.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/entity/CraftEntity
        at com.edwardhand.mobrider.listeners.RiderTargetListener.onEntityTarget(RiderTargetListener.java:42)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        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)
        ... 16 more