You need DirectX 10 compatible hardware to run the 3DMark Cloud Gate benchmark.
If you know for a fact that you have the proper hardware and are still getting this error, it may be caused by a corrupt video driver installation. Try completely removing your video drivers with a third-party driver cleaning utility, then reinstall the latest available drivers and try again.
If you cannot resolve the issue, and you think you are getting this message in error, then please contact us with details about your hardware, including the DXDIAG output text file.