I have a new Samsung home theater system. I have it connected to my TV with an HDMI cord, and when I watch a Blu-ray, the picture comes up and the speakers all work great. However, I can not figure out how to get the sound to go through the home theater system when I am watching FIOS. I have 4 HDMI ports on my TV (vizio, approx 3 years old) but only one HDMI port on the back of the bluray/HTS box and only one HDMI port on the back of my FIOS box. All three seem to have the ability to connect an optical audio cord. Should I get one and plug one end into the FIOS box and the other end into the bluray/HTS box? I'm so frustrated.