Bukkit

2013-02-26 17:22:56 [SEVERE] Could not pass event PlayerInteractEvent to ProtectBlock v1.5
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_4_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:178)
    at net.minecraft.server.v1_4_R1.PlayerInteractManager.interact(PlayerInteractManager.java:376)
    at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:657)
    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:113)
    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
    at com.yianni000.ProtectBlock.Friends.getChilds(Friends.java:61)
    at com.yianni000.ProtectBlock.PBEvents.onPlayerOpenChestDoor(PBEvents.java:281)
    at sun.reflect.GeneratedMethodAccessor69.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