Hi, I have an Onkyo 7.1 reciever with the matching onkyo 6 dvd changer. I have the audio hooked up with the (orange) digital coax cable, and the audio works wonderfully through the surround. However when i turn on speaker set B (speakers in the ceilings around the house) there is no audio in B, speaker A still plays however. Does anyone know why? i can't figure it out.