Just got a vizio Hdtv and hooked it up to Dish, it works great. When i pluged in my stereo it works but i can't shut it off or mute it with the Tv. When it was hooked up to my other tv it worked ok, I Don't know what i am doing wrong, i pluged it in to the auido outputs on the hdtv but this model 42 has several outputs, there is one right next to the hdmi connection can someone help me out.