I don't know if you have it in BIOS, but if you do, the AGP apeture size should be set to at least 64MB. If it's not it sorta disables AGP. The other thing I can think of is that there really isn't AGP at all on the newest Intel chipsets (i915 and i925), so if Direct X is telling you that but things are working fine, I really wouldn't worry about it. You could make sure that DirectX is up to date if you haven't already.