Flash Overlapping

Basically i have a flash project… it is a hybrid site where the menu is flash… basically also i have a flash animation that expands when you click it… the problem now is that i have two flash movie… and the flash that expands is in div(css) since it will expand through the whole website… the problem is it has to expand and cover the flash menu,. but it doesnt cover the menu and when expands up to the menu it goes under the menu and not over it…

is there a coding problem here? or a flash problem? can you help me how can i overlap the flash that expandds to the flash menu?

thanks so much