[SEVERE] Could not pass event PLAYER_INTERACT to BukkitContrib
java.lang.ClassCastException: org.getspout.spout.SpoutNetServerHandler cannot be cast to org.bukkitcontrib.ContribNetServerHandler
at org.bukkitcontrib.player.ContribCraftPlayer.getNetServerHandler(ContribCraftPlayer.java:494)
at org.bukkitcontrib.ContribPlayerListener.onPlayerInteract(ContribPlayerListener.java:69)
at org.bukkit.plugin.java.JavaPluginLoader$11.execute(JavaPluginLoader.java:314)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:338)
at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:168)
at net.minecraft.server.ItemInWorldManager.interact(ItemInWorldManager.java:210)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:573)
at net.minecraft.server.Packet15Place.a(SourceFile:57)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:89)
at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:435)
at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:454)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)