DirectDraw & Direct3D acceleration not available

My big, beautiful Dell 2405FPW arrived yesterday, and on one of the computers I have it connected to I can't enable DirectDraw or Direct3D acceleration. The card is a VisionTek Xtasy Radeon 9100 PCI 128 and I am using DVI-D. The board is an Asus A7S266-VM/U2 with integrated SiS 740 graphics.

- I've gone into its BIOS and set Primary VGA as PCI card.
- In Device Manager I have disabled the SiS 740.
- I've used ATi Uninstall and Driver Cleaner to clean out all ATi files and regkeys.
- I've used DXBuster to clean out all traces of DirectX.
- I've reinstalled DirectX 9.0c and Catalyst 5.6
- I've also tried lower, much lower resolutions, but still no change.

So, how do I get these things working?

Nobody knows?

Fixed. Just had to enable the SiS in Device Manager, and have no monitor attached in Display Properties.

hey hey hey you posted this exact same thread over at techimo!

Yep. And SysOpt, AnandTech, and Sharky Forums. When I want an answer, I go all out!