I have done some searching on this and found some related topics but none that I understand the solution!
So here is my issue, I have a Yamaha RX V373 5.1 Receiver and a Samsung HDTV and MySky HDi.
I have the HDMI cable from the TV to the Sky unit as per the installation guy. I then bought the receiver and connected the optical cable from Sky to the receiver. This gives me sound in all 5.1 channels, however I cant control the volume with the Sky remote now, only the receiver.
I have not played around with stereos in some time and the technology is new to me!