Modify Multi-Level Drop Down Menu

I have a menu that was programmed and worked perfectly in most browsers. However, we are getting complaints from customers that they cannot see the menu because they are using Internet Explorer. I cannot make all the viewer get a NEW Internet Explorer, so I need to make the website work with the OLD Internet Explorer (version 5?). Please view the site, and please do not bid unless you know you can make this work. You can view the test files at [login to view URL] Thank you so much!