Bukkit

2012-05-23 16:14:16 [SEVERE] Could not pass event PlayerLoginEvent to MessageChangerLite
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.ServerConfigurationManager.attemptLogin(ServerConfigurationManager.java:227)
	at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:102)
	at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:41)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:61)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:558)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:450)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.NullPointerException
	at org.simiancage.bukkit.messagechangerlite.PlayerListenerMCL.onPlayerLogin(PlayerListenerMCL.java:19)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.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)
	... 9 more