Hello is there anyone who can help me out with the following?

on [url]http://www.dustrain.nl/mm/[/url] i have made a trial with a popup menu in
fireworks, but if you click somewere in the page the menu disappears. i have
tried a lot of things already and have searched trough the net a lot but i
cannot find the solution.. what am i doing wrong????

Looking forward for a solution or a good answer..

Sincerely Mephio©