I am trying to connect my Vizio HDTV up to my 2007 MacBook Pro, but am having trouble getting audio out to the tv. I'm using a DVI to HDMI cable, but obviously that won't send audio. I purchased this cable from MonoPrice: http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10229&cs_id=1022902 &p_id=1558&seq=1&format=2 I plugged the cable in to the back of the tv and into the headphone jack of my laptop, but there is no sound at all. When I go to the System Preferences under "Sound" and then "Output" it allows me to choose a device for sound output, but the only choice available is "Digital Out." Under "Settings for the selected device" it says, "The Selected device has no output controls." Can anyone tell me what's wrong???