iChat

2011-02-25 21:41:11 [SEVERE] Could not pass event PLAYER_CHAT to iChat
java.lang.NoSuchMethodError: org.anjocaido.groupmanager.GroupManager.getHandler(
)Lorg/anjocaido/groupmanager/AnjoPermissionsHandler;
        at net.TheDgtl.iChat.iChat.getPrefix(iChat.java:210)
        at net.TheDgtl.iChat.playerListener.onPlayerChat(playerListener.java:21)

        at org.bukkit.plugin.java.JavaPluginLoader$7.execute(JavaPluginLoader.ja
va:160)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:59)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:225)
        at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:607)

        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:595)
        at net.minecraft.server.Packet3Chat.a(SourceFile:24)
        at net.minecraft.server.NetworkManager.a(SourceFile:230)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:70)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:100)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:338)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:253)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)