Rollover menu

I’m having a problem with a rollover button, maybe someone can help? When you put the cursor on the rollover button, the navigation menu comes up. But when you take the cursor off, the menu still stays. My client wants the menu to disappear. I’m working in Flash MX. How do I do that??

Here is my example of how its funcitioning right now. http://www.homesight.net/clients/aexllp/scale/

Thanks-
JB