I recently received a Sony HT CT150 Home theater system and I am having some trouble making it work. The problem seems to lie in the fact that my cable box has neither an HDMI port or a digital optical out jack. The sound from cable tv plays through the speakers but not the subwoofer when I use cable, but I cannot seem to get the xbox to work correctly nor can I get the subwoofer to play when using cable. Any thoughts would be greatly appreciated.