Transparent anmation and html page

Hi,

I’m very new to Flash. I’m trying to build a dropdown menu in Flash to be placed in html web page. With the help of this tutorial http://www.kirupa.com/developer/mx/transparency.htm I could manage the transparency.
But now, I’m in front of a big problem: all links of the html pages that are below the Flash animation area are no more accessible.
Can some pro tell me if there is a way to avoid this?

Thanks,

Vince