errors

19:34:06  [SEVERE] Could not pass event PlayerInteractEvent to TekkitCustomizer v1.6
19:34:06 org.bukkit.event.EventException
19:34:06 at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:363)
19:34:06 at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
19:34:06 at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:31)
19:34:06 at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:479)
19:34:06 at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java)
19:34:06 at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:189)
19:34:06 at net.minecraft.item.ItemInWorldManager.func_73074_a(ItemInWorldManager.java:164)
19:34:06 at net.minecraft.network.NetServerHandler.func_72510_a(NetServerHandler.java:752)
19:34:06 at net.minecraft.network.packet.Packet14BlockDig.func_73279_a(SourceFile:46)
19:34:06 at net.minecraft.network.TcpConnection.func_74447_i(TcpConnection.java:323)
19:34:06 at net.minecraft.network.TcpConnection.readNetworkPacket(TcpConnection.java:74)
19:34:06 at net.minecraft.network.TcpReaderThread.run(ReplaceTcpReaderThread.java:22)
19:34:06 Caused by: java.lang.NullPointerException