Site doesn't work in Explorer (Help!)

I built a site in Flash 8 on a Mac. Tested on my computer and works fine in Safari and Firefox. Been hearing that people on PCs viewing the site in Explorer only see part of the swf file.

They can’t see any buttons. All they see is the image of the dog on the front page. (The page opens to the a box on the left w/ an image of a dog and buttons on the right. As you click buttons, the links appear in the space where the dog was, but the background image become white instead of the dog. It’s a portfolio website.)

What can I do?