Script: AnyLink CSS Menu

Hi everyone I'm new here
My problem is... I put the flash object as background of the page by set it to 100% width

And then I put the rest of my content include the CSS Menu on top of it by put it in a <div> tag everything works fine except :

When mouse out of the dropdown menu, it didn't hide them (In Firefox/Netscape only, In IE/Opera it's work fine).

I'm surely it's because of the flash bg but Can anyone have the solution to fix this error?

Thanks for any answer.

PS. Sorry for my English. It's not my native language.