CraftBukkit v1.5.2-R0.1 - LiveChat Plugin Error

18:25:38 [SEVERE] Could not pass event AsyncPlayerChatEvent to LiveChat v3.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
	at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:888)
	at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:840)
	at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.v1_5_R3.NetworkManager.i(NetworkManager.java:210)
	at net.minecraft.server.v1_5_R3.NetworkManager.c(NetworkManager.java:346)
	at net.minecraft.server.v1_5_R3.NetworkReaderThread.run(SourceFile:94)
Caused by: java.lang.NullPointerException
	at me.main.LiveChat.PlayerDisplayName.main(PlayerDisplayName.java:11)
	at me.main.LiveChat.Listeners.ChatListener.onPlayerChat(ChatListener.java:30)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 9 more