Well, your signature image generator is working fine:
http://projecthewitt.co.cc/Poko/siggy.php?id=1
The problem is due to you having incorrect settings in your config.php. For some reason your BBCode looks like:
Code:
You have:
Code:
http://www.projecthewitt.co.cchttp://projecthewitt.co.cc/Poko/levelup.php?id=2
It looks like you configured something incorrectly as you shouldn't have the domain listed twice. :)