Problem with full screen flash page

Hello,
I’ve followed the tutorial for loading a full screen page while keeping the original pixel size, however when I publish the html file, I can only see a small piece of my background image. All buttons and swf’s aren’t there anymore. All I want is for my 800x600 swf to load in the center of any visitor’s browser. Suggestons? ps I’m using MX professional. thnx