Open your html in dreamweaver and alter your Flash movie's 'width' and 'height' in the 'properties box': w = 100% h =100%. If it's to be scale proportionally then make sure 'scale' in the dreamweaver 'properties box' says "Default (Show all)". Otherwise this can be set to "Exact fit" which allows your Flash movie to also fill the browser but may stretch it out of proportion slightly.