lockette

2012-04-26 17:01:53 [SEVERE] Could not pass event SignChangeEvent to Lockette
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:1265)
    at net.minecraft.server.Packet130UpdateSign.handle(SourceFile:41)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:113)
    at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:169)
    at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:551)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:449)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.IncompatibleClassChangeError: Expecting non-static method com.palmergames.bukkit.towny.object.TownyUniverse.isWilderness(Lorg/bukkit/block/Block;)Z
    at org.yi.acru.bukkit.PluginCore.canBuild(PluginCore.java:614)
    at org.yi.acru.bukkit.Lockette.LocketteBlockListener.onSignChange(LocketteBlockListener.java:614)
    at sun.reflect.GeneratedMethodAccessor381.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:301)
    ... 11 more