Bukkit

Narrowtuxlib errors:

15:40:12 [SEVERE] Could not pass event PLAYER_CHAT to NarrowtuxLib
java.lang.NoClassDefFoundError: info/somethingodd/bukkit/OddItem/OddItem
        at de.moritzschmale.Showcase.ShowcaseCreationAssistant$1.onPageInput(ShowcaseCreationAssistant.java:44)
        at com.narrowtux.Assistant.Assistant.onPlayerChat(Assistant.java:60)
        at com.narrowtux.event.NTLPlayerListener.onPlayerChat(NTLPlayerListener.java:15)
        at org.bukkit.plugin.java.JavaPluginLoader$6.execute(JavaPluginLoader.java:279)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:338)
        at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:706)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:694)
        at net.minecraft.server.Packet3Chat.a(Packet3Chat.java:33)
        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:478)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:105)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:453)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:363)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)