Xyonix

I have downloaded the wvc1cmo package to install WVC1 codec in order to play specific video files, but when trying to install this annoying piece of codec, I get the following message; EVEN THOUGH I actually have installed the Windows Media Format 9.5 SDK! What do I do here? Could it be that I don't have the right one? Some advice or a link to the proper driver would be appreciated .