After I did what you said the On Demand button now opens My Dvr. My Dvr button never did work. The A button open Aux. The C button does nothing. Haven't checked the B button.

Update: I did your step by step instructions again but substituting the My Dvr button in place of the On Demand button. The My Dvr button now works but the On Demand button opens My Dvr too. Stil having problems with the A, B and C buttons.

Is there any way I can get this remote to go back to the Comcast default? so I all I have to do is program Aux and TV buttons?

Thanks,
Larry