I have an HD Slingbox. I can successfully change the channels, view the guide, etc when using a pc or iphone. I just installed a slingcatcher for a tv on the patio. The catcher is working great - good picture and sound, however, the remote doesn't have any functionality. When I hit a button like Guide, Menu, Channel Up, etc all the happens is a small popup screen appears saying the corresponding word "Menu".... then it dissapears - nothing happens. I assume the slingcatcher is supposed to have the ability to change the channel. What do I need to do?