I'm trying to get an AV sender and receiver to work between a MySky box and a TV. The sender is plugged in the VCR SCART at the back of MySky and the receiver is plugged in the Composite RCA's of the TV. I'm not getting anything, I've tried all the available channels and It won't even pick up white noise. I've also tried to connect the sender to the video out RCA on the back of MySky but it has made no difference. Any suggestions?