Maxbans error

2013-02-16 19:47:18 [WARNING] Unexpected exception while parsing console command "unban thudog"
org.bukkit.command.CommandException: Unhandled exception executing command 'unban' in plugin MaxBans v1.3
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchServerCommand(CraftServer.java:506)
	at net.minecraft.server.v1_4_R1.DedicatedServer.al(DedicatedServer.java:260)
	at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:225)
	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 org.maxgamer.maxbans.commands.UnbanCommand.run(UnbanCommand.java:82)
	at org.maxgamer.maxbans.commands.CmdSkeleton.onCommand(CmdSkeleton.java:47)
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
	... 8 more