Bukkit

What steps will reproduce the problem?
I don't really know it... Sorry.

What is the expected output? What do you see instead?
"Can not preform CCTV."

What version of the product are you using? 2.8

Do you have an error log of what happened?

2013-04-22 14:39:26 [SEVERE] Could not pass event PlayerInteractEvent to CCTV Camera v2.8
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_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:185)
    at org.bukkit.craftbukkit.v1_5_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:155)
    at net.minecraft.server.v1_5_R2.PlayerConnection.a(PlayerConnection.java:612)
    at net.minecraft.server.v1_5_R2.Packet15Place.handle(SourceFile:58)
    at net.minecraft.server.v1_5_R2.NetworkManager.b(NetworkManager.java:292)
    at net.minecraft.server.v1_5_R2.PlayerConnection.d(PlayerConnection.java:110)
    at net.minecraft.server.v1_5_R2.ServerConnection.b(SourceFile:35)
    at net.minecraft.server.v1_5_R2.DedicatedServerConnection.b(SourceFile:30)
    at net.minecraft.server.v1_5_R2.MinecraftServer.r(MinecraftServer.java:580)
    at net.minecraft.server.v1_5_R2.DedicatedServer.r(DedicatedServer.java:225)
    at net.minecraft.server.v1_5_R2.MinecraftServer.q(MinecraftServer.java:476)
    at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java:409)
    at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.NullPointerException
    at me.sayaad.CCTV.listener.onPlayerInteract(listener.java:405)
    at sun.reflect.GeneratedMethodAccessor31.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

Please provide any additional information below.

This most likely is related to the decompatibility of Bukkit version 1.5.1. The bug that can be fixed only by restarting the server. / reload plugins does not help. Sorry for my bad English, I'm German.