Hello, I have a used Kenwood VR407 system that I was assured everything worked perfect. However no matter what I try, I can only get the front 2 speakers to work in stereo, I cannot get all the speakers to go. I have an new TV, set to surround. I have regular cable that goes to my dvd player, then goes to the tv. Using s video cable form dvd to tv. I have the red/white audio cable going from audio out, to video 3 in on the receiver. Can only get front stereo speakers to work. Please help.