Could not pass event. Help please?

[ghost]

[SEVERE] Could not pass event PlayerInteractEvent to DiabloDrops v2.2.369 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.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:35) at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477) at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462) at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178) at org.bukkit.craftbukkit.v1_4_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:148) at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:626) at net.minecraft.server.v1_4_R1.Packet15Place.handle(SourceFile:58) at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290) at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:112) at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39) at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30) at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598) at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224) at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494) at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427) at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849) Caused by: java.lang.NullPointerException

[ToppleTheNun]

That's not the full error. I need more information after the NullPointerException.