1.4.7 - LWC Error - 1.4.7

15:27:35 [INFO] NinjaKingRo issued server command: /lock
15:27:35 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'lock
' in plugin LWC v4.3.1 (b820-git-MANUAL) (February 02, 2013)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
6)
        at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServe
r.java:514)
        at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerCon
nection.java:980)
        at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.j
ava:898)
        at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java
:853)
        at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
        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:3
0)
        at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:5
98)
        at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:2
24)
        at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:4
94)
        at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java
:427)
        at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:8
49)
Caused by: java.lang.NullPointerException
        at com.griefcraft.lwc.LWCPlugin.onCommand(LWCPlugin.java:172)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
        ... 15 more
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