IE WebControl TreeView with FireFox

[casey chesnut]

yes, i know they are not supported

but i'm using it on my web page.
works great in IE, but when i try to expand a folder in FireFox,
the TreeView just goes away and the page is blank.
you can try it here: http://www.brains-N-brawn.com
using the JavaScript tool, i dont see any errors.

so is there a quick fix i can do to make it work in FireFox too?

i would consider swapping out controls if that is feasible.
is there a different TreeView control that works with the same node Schema?

Thanks,
casey