Hi. I recently purchased the DVI to VGA that apple sells on their website. The picture comes in great, but there is no sound! I tried the RCA cable that converts the headphone jack into the R,W,Y inputs onto the back of my television. I even checked 'System Preferences' and the output was specified for 'headphones.' I don't know if I plugged it into the wrong spot or anything, but any help would be appreciated.