Crossfire for windows 8

can anyone give me advice for getting crossfire to work on a Toshiba labtop running windows 8? so many people on crossfire are able to play it on their windows 8, but no matter what i try i just cant seem to get it to work..
-ive tried every compatibility mode.
-tried reinstalling it
-ive had many friends who work on computers to get it to work but no luck..