Hello all. I own a Pioneer VSXD-908S receiver, which I have been using for about 4 months. Just recently, I hooked rear speakers up to this receiver. Until then, I had only mains, center and sub. Since the rear speakers have been added, the power of the receiver clicks off after about 40 minutes of CD and/or DVD pleasure. I turn the power back on, and it will stay on for maybe 1 minute. After that it won't stay on at all. It almost acts as if it is overheating. Two points: 1) If I then turn off the source (CD / DVD), the receiver stays on - no problem. 2) Or if I disconnect the wires to the rear speakers, the receiver stays on - no problem. What could be happening that would cause the presence of Speaker wires to power off this amp (only if there is a signal coming through)?? Thanks for any help and/or insight.