I didn't have a problem programming my original remote to work the volume up/down and mute function on my Denon receiver. For the life of me, I cannot seem to program the replacement remote that was sent for my HR22. (Some of the other buttons did not work.) I enter the proper code and manage to get the Denon receiver to turn off, but nothing I do can get the volume up/down and mute to work, I called tech support and they gave me a few additional codes to try but nothing seems to work. Any ideas?