04:44:11 [INFO] SilverKytten issued server command: /ss join arena1
04:44:11 [SEVERE] java.lang.NumberFormatException: For input string: "arena1"
04:44:11 [SEVERE]       at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
04:44:11 [SEVERE]       at java.lang.Integer.parseInt(Integer.java:492)
04:44:11 [SEVERE]       at java.lang.Integer.parseInt(Integer.java:527)
04:44:11 [SEVERE]       at org.mcsg.double0negative.spleef.commands.Join.onCommand(Join.java:12)
04:44:11 [SEVERE]       at org.mcsg.double0negative.spleef.CommandHandler.onCommand(CommandHandler.java:118)
04:44:11 [SEVERE]       at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
04:44:11 [SEVERE]       at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:189)
04:44:11 [SEVERE]       at org.bukkit.craftbukkit.v1_5_R3.CraftServer.dispatchCommand(CraftServer.java:523)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.PlayerConnection.handleCommand(PlayerConnection.java:965)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.PlayerConnection.chat(PlayerConnection.java:883)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:840)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.Packet3Chat.handle(Packet3Chat.java:44)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:109)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
04:44:11 [SEVERE]       at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)