I was given an LG soundbar with 2 audio optical outs, my TV has none, although I do have it connected to my cable box which has the correct connection. Problem is, I can't seem to connect to my bluray player an get sound from it. I have a Dynex audio optical to rca converter hooked up to the blueray from the soundbar...still no sound. bluray sound only comes out of the TV...what am I doing wrong? audio optical out from BR to converter, rca out to tv? the BR has hdmi and rca outs