I have a Slingbox Pro HD. I am trying to get analog and HD channels to my television. It is not possible using the coax cable. This only gives me analog channels. I have bought a set top box, and I was hoping that I could use this to get the HD channels through to my Slingbox. How do I do this? I have tried to do it through the coax cable but that is only a loop. I have a connection from the set top box to the television (scart) then I tried to take the scart from the box and then connect that to the Sling box through composite, but I am not getting a signal. My set top box has scart and HDMI but the slingbox doesn't have HDMI. Can you help me, please?