Shoutbox

This may sound somewhat confusing, but the fact you've been able to install DirectX 9.0 software does not necessarily mean the graphics hardware is "DirectX 9.0 compatible".  For software, it is simply the version and it will always fall back and work with older graphics cards; for hardware, it is a specification of minimum required features the graphics chipset must implement.

There could be some correctable software problem here, but I would suggest that you begin by finding out what the graphics card is and whether it meets the minimum requirements of the game in question -- it is most likely inadequate.