[Help] v18 Crashing

Hey!
So I'm trying to make a v18 retro cause I miss oldschool Habbo and I want a place to screw around with a few friends.

Problem is, I can't register on it. Every time I click the registration button, it crashes! But my friend registered and plays fine. Anyone have any idea?


Here's the error:


I'm using Debbo v3.5 and I'm hosting my own dcrs. You can try it on http://xanon.org.uk/retro/