dropdown issues with Explorer 7

I’m having some issues with my dropdown menus in Explorer 7. Actually I’m having issues in 6 as well but after reading some of the posts on the matter have decided not to support IE 6.

In IE7 the dropdowns don’t disappear after the mouse rolls off a child menu. If the user rolls the mouse up, over the parent menu, no problem.

My site is https://www.ksuptemp.com

Any thoughts?

Thanks