I just received my speakers this week and I was sooo excited but, now I've run into a snag when trying to setup the surround speakers. I have a Denon AVR-988 and I've tried everything to get sound from my surround speakers, a pair of 4Bs. When I go to setup and play the test tones, I here the tones coming from my two fronts, center, and subwoofer but, nothing from the surrounds. Any suggestions?

 - JJ