vitals error

2012-08-17 02:15:45 [SEVERE] Could not pass event PlayerCommandPreprocessEvent to Vitals
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:332)
	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:462)
	at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:871)
	at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:825)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:807)
	at net.minecraft.serverhook.NetServerHandlerProxy.a(NetServerHandlerProxy.java:124)
	at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:276)
	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:109)
	at net.minecraft.server.ServerConnection.b(SourceFile:35)
	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:581)
	at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
	at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.NullPointerException
	at com.pzxc.Vitals.Vitals.townyprice(Vitals.java:1313)
	at com.pzxc.Vitals.Vitals.onPlayerCommandPreprocess(Vitals.java:397)
	at sun.reflect.GeneratedMethodAccessor202.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:330)
	... 17 more