Problem Getting HD Receiver to Work With PC

I just got a new HD Receiver and am trying to set up to work with my PC using Windows Media Center (Windows 7 64 bit).

None of the codes or options I have tried are working.

I am being asked

- How many digits to enter for a channel number (2, 3 or 4)

- Whether to enter OK after entering the channel number

I have tried with all options and setting up automatically, by choosing a manufacturer and code and by doing it manually by pressing every key on the remote and none work.

What should the remote code be for the Motorola QIP7100-1? I have tried entering every code available for Motorola and have also tried General Instrument codes based on advice from another posting.