Penumbra: Overture DEMO Crash on startup

[DokeyDokeyPanick]

When starting up the game it goes to a blank screen shortly after followed by leading me back to my desktop with an error message stating my graphics card does not support vertex shading or is not up to date, which it both supports vertex shading and is up to date, is there anything else i could do, i'd like to play the demo it looks like a promising game!