[jQuery] IE stops recurring ajax call

Hi list,

I have written a dynamic form that gets stuff from a db and puts it
into select boxes. After selecting the first, the form reloads to the
next. In total I have maximum 3 selectors to show up.

It works flawlessly in FF, Safari, Chrome... But IE is being nasty on
me!
Any idea on how to make this work in IE as well?

Thanks in advance for the thoughts!

Here's the script I am using: http://pastie.org/private/uyofox5ak8q9q8awcoz48g