2014-01-18 20:42:55 [SEVERE] Could not pass event PlayerInteractEntityEvent to HorseModify v1.4.1
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 net.minecraft.server.v1_6_R3.PlayerConnection.a(PlayerConnection.java:1097)
	at net.minecraft.server.v1_6_R3.Packet7UseEntity.handle(SourceFile:36)
	at net.minecraft.server.v1_6_R3.Packet7UseEntity$$EnhancerByCGLIB$$6ca879ac.CGLIB$handle$0(<generated>)
	at net.minecraft.server.v1_6_R3.Packet7UseEntity$$EnhancerByCGLIB$$6ca879ac$$FastClassByCGLIB$$6a1be41a.invoke(<generated>)
	at com.comphenix.net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
	at com.comphenix.protocol.injector.packet.ReadPacketModifier.intercept(ReadPacketModifier.java:131)
	at net.minecraft.server.v1_6_R3.Packet7UseEntity$$EnhancerByCGLIB$$6ca879ac.handle(<generated>)
	at net.minecraft.server.v1_6_R3.NetworkManager.b(NetworkManager.java:296)
	at net.minecraft.server.v1_6_R3.PlayerConnection.e(PlayerConnection.java:116)
	at net.minecraft.server.v1_6_R3.ServerConnection.b(SourceFile:37)
	at net.minecraft.server.v1_6_R3.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_6_R3.MinecraftServer.t(MinecraftServer.java:592)
	at net.minecraft.server.v1_6_R3.DedicatedServer.t(DedicatedServer.java:227)
	at net.minecraft.server.v1_6_R3.MinecraftServer.s(MinecraftServer.java:488)
	at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:421)
	at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
Caused by: java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/v1_6_R2/entity/CraftHorse
	at me.ifamasssxd.HorseModify.HorseModifier.onPlayerInteractEntity(HorseModifier.java:435)
	at sun.reflect.GeneratedMethodAccessor42.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)
	... 19 more