i hooked up my sound sound last night and when watching something, like opening scene to top gun(havent tried any dvd's yet) on youtube, i can hear sound from the rear. But when testing my speaker set up on a 5.1 surround sound test,(
) my rear speakers don't have any sound. The sound comes out of the front L & R when it sound be out of the rear L & R. It's bothersome to me bc it makes me think that something is wrong. When changing the db on my speakers through the receiver i can hear noise. any ideas on what may be wrong?