Horizontal menu centering in IE

I have a site where a menu bar, with no fixed width, needs to be centere4d horizontally. It works in FF and I tried several methods I saw online.
It could be because I'm trying to center a UL tag, but I'm not sure. The website is at:
http://www.silverchild.com/its/default.htm

http://www.codingforums.com/showthread.php?t=136184&highlight=center+navigation

take a look at my post on that. Centers a UL menu horizontally.