HELP! I just bought a BUSH PRo 150 5.1 surround sound package. I've got it out and the cable which goes from TV/DVD played only has 2 channels (Red/White), the cable I received with the new system has 6 phono plugs either end, I've plugged all into the sub box (Where they are supposed to go) but I only have a red/white phono on either the TV or DVD player - I can only get output to 2 speakers??? I had an old system that just took the 2 channel input and fed it to 5 speakers/subwoofer...