Got my cable, DVD, VCR all plugged into a Digisend Gold transmitter. Receiver is in a room not too far away and the picture/sound is OK. I used to be able to select the source with the remote control so I could watch cable, DVD or VCR on the receiving TV. However, now when I change source, it shows the new source for a split second and then goes back to source 1. I've tried changing the video and remote channels to no avail. Digisender/AEI support have been less than useful, telling me to "switch both units off for 20 minutes and try again". Genius. Any ideas anyone???