Radeon X600?

Does anybody have a Radeon X600 working with Suse 9.3? We have a Sapphire 256MB X600 Proc PCI-e card and can't persuade X to start properly. We just see a black screen after starting X. sax2 also shows the same symptoms, displaying a black screen after startup. Running yast in text mode and trying Hardware/Graphics gives a correct listing of the card, but trying to select the Change option doesn't work. Thanks, Dave