RandomTP Button Error

2013-06-02 22:56:22 [SEVERE] Could not pass event PlayerInteractEvent to RandomTP v1.1.0
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:462)
	at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:186)
	at net.minecraft.server.v1_5_R3.PlayerInteractManager.interact(PlayerInteractManager.java:370)
	at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:631)
	at net.minecraft.server.v1_5_R3.Packet15Place.handle(SourceFile:58)
	at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292)
	at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:109)
	at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
	at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)
	at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
	at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException
	at com.nedcraft.dpasi314.RandomTP.Listeners.BlockListener.onPlayerInteract(BlockListener.java:43)
	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:425)
	... 16 more