BFA Subscribe not working for me

I'm not sure what I've done wrong with the widget

I put my feedburner feed ID in the options but the widget doesn't appear to be working on IE or FF. Am I meant to fill in all the boxes. I thought they were optional
http://www.60secondsanitybreak.com/

The title of the widget is above the header
The rest of the widget is below the posts

Is there a simple guide to using this widget? Any help appreciated