How to make entire flash banner to link to a site when clicked on?

I think the title says it all…

I tried making a button and have the alpha to 0, but will not go to link.

I have a button that links to site

function gotoSite(event:MouseEvent):void
var nameURL:URLRequest = new URLRequest("");

btn1.addEventListener(MouseEvent.CLICK, gotoSite);

then I tried adding in the other button (over the entire movie) below the btn1…

btnMovie.addEventListener(MouseEvent.CLICK, gotoSite);

and it will not work… is there another way for me to do this?