I have a Samsung 43" 3d Tv Model number PS43E490B and I am trying to connect a Samsung HW - E450 soundbar. I am getting no sound whatsoever. I was told I needed an ARC cable so I went out and bought one which still didn''''t work, I then went out to buy an Optical Cable - I went out and bought one, it didn''''t work. I have tried the aux cable that came with the system, that failed to work as has a standard hdmi cable. The settings I have are as follows - In the tv I have the hdmi 2 socket selected, the cable goes to the out hdmi on the soundbar and I have the external speaker setting on The Tv. The soundbar is set to hdmi (or whatever input is connected) Is there something I am doing wrong??, Thanks in advance.