"ERROR: could not Initialize directx 9 renderer"

I'm running Windows Vista 32 Bit (Home Premium) on my Macbook (not Pro).

I installed the drivers from the Mac OS X Leopard disc.

I went to the Apple site and downloaded and installed the Boot Camp Update 2.1 for Windows Vista 32 Bit.

I cannot load Painkiller, a game that's run off of Direct X 9. Everytime I try to start the game, I get this error message:

"ERROR: could not Initialize directx 9 renderer"

Is there any way I can download newer graphics drivers or something?

This laptop has the Mobile Intel 945 Express display adapter (Intel GMA 950). I don't know how useful that information is. I don't have any other games to try running.

When I run DXDIAG all the tests pass successfully.