I have a Sony Bravia TV, Blue Ray player and HT CT-150 sound bar system. Comcast is my cable provider. I have plugged the HDMI cable from my Comcast digital box into the sub-woofer on the CT-150. I would really like to be able to use ONE remote control for all of the components. I have a Sony RM-AAU073 remote control. I can control all of the Sony components but can't figure out how to change the channels/use the guide function on my cable box. Any suggestions would be greatly appreciated.