Graphic Card does not support Vertex Shaders.

[jens]

This might sound odd, but it could help to uninstall the driver, then reboot and reinstall the same driver again.

Also make sure that the driver you have is from ATI and not from the manufacturer of the computer or from Windows update.

Last you could try an alternative driver, such as omegadriver.

The 9800 pro should not have a problem running the game, I had a 9600 during the whole development of Penumbra Overture.