I have recently purchased a sound bar for my downstairs living room and am having some issues with the sound. I have set everything up as per the instrcutions and when I point my sky remote at the sound bar it works perfectly. The issue I have is when my sound Bar is mounted behind my tv so when pointing the remote at the tv to adjust volume my Samsung TV just displays a small logo I believe represent an optical cable. Can anyone advise on how I can adjust the volume with the sky remote via the TV please????