I was using my Sky digibox connected to my Panny plasma PC input with a syncblaster cable to enable me to have an RGB input and it worked well. Now I have changed to Sky+ and it will not work using the syncblaster. I don't know why. What alternative do I have to enable an RGB picture? The Panny S socket is used for my VCR and the component input for my DVD player. My amp is a Denon 11SR. I am totally confused and would appreciate lay-mans terms please.