On monday this week i bought a ATI Radeon HD 2400 PRO video card. I put it in my HP Media Center m7167c Desktop PC and installed the drivers. Since then my audio/sound has not been working. My computer plays the sounds but i dont think it recognizes the headphones or my speakers. Any help would be great P.S. When i used to plug in my headphones it would say "a jack has been plugged in" or something like that same when i pulled it out. Doesnt happen anymore.