Bukkit

What steps will reproduce the problem?
1. Create an arena using the wizard
2. Watch it crash

How often does the problem occur? All the time, or only for some cases?
Always

What is the expected output? What do you see instead?
I expect the next question to show up or for it to create the arena but it does not, instead the plugin crashes

What version of the product are you using? (use version numbers)
HGMGS - v1.1pre

Do you have an error log of what happened? (server.log in your Bukkit folder can be text-edited)
http://pastebin.com/SrtytWWv

Please provide any additional information below.
Please fix this fast! I really need this plugin for my server.