Need Help with CSS Dropdown Menu's (only works in firefox? not in IE)

[fbauto1]

Need help here guys/gals...

I recently added a css dropdown menu system on my site.
But it only works in FireFox.

If I use IE, they just show as regular texts.

This is the system I am using
http://www.lwis.net/free-css-drop-down-menu/

and this is my site with the css dropdown system in it.
http://www.flipbooth.com

When I put the code in my site, it only works with FIrefox.
But when I open up the demo .html file in IE, it works, but not while it's in my LIVE site.

Please help.
THanks

[fbauto1]

:bump: anyone ?