Bukkit

What is the issue?
i type /as aka /adminsword
Then in chat i get "An internal error occurred while attempting to perform this command

Please provide any additional information below.

and in console i get

... 15 more [
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [
at com.github.spy1134.adminsword.AdminSwordCommands.onCommand(AdminSwordCommands.java:16) [
at com.github.spy1134.adminsword.AdminSwordCommands.toggleCommand(AdminSwordCommands.java:176) [
at com.github.spy1134.adminsword.AdminSwordMain.toggleAdminSword(AdminSwordMain.java:83) [
at com.github.spy1134.adminsword.AdminSwordMain.getAdminSwordType(AdminSwordMain.java:139) [
at com.github.spy1134.adminsword.AdminSwordMain.setAdminSwordType(AdminSwordMain.java:151) [
at org.bukkit.craftbukkit.v1_5_R3.entity.CraftPlayer.setMetadata(CraftPlayer.java:867) [
at org.bukkit.metadata.MetadataStoreBase.setMetadata(MetadataStoreBase.java:37) [
at java.util.WeakHashMap.put(WeakHashMap.java:516) [
at java.util.WeakHashMap.hash(WeakHashMap.java:364) [
at org.bukkit.plugin.PluginBase.hashCode(PluginBase.java:11) [
at org.bukkit.plugin.PluginBase.getName(PluginBase.java:29) [
Caused by: java.lang.NullPointerException [
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573) [
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410) [
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477) [
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226) [
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581) [
at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30) [
at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35) [
at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:109) [
at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292) [
at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44) [
at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:840) [
at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:883) [
at net.minecraft.server.v1_5_R3.PlayerConnection.handleCommand(PlayerConnection.java:965) [
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchCommand(CraftServer.java:523) [
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189) [
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) [
org.bukkit.command.CommandException: Unhandled exception executing command 'as' in plugin AdminSword v1.3.2 [
2013-05-06 03:15:51 [SEVERE] null