Microsoft Media Center Remote 1039 with Pace DC50X, Setup Box cannot change channels

I use Vista Media Center to record tv shows etc...
Recently I had to use a Comcast Digital Adapter Transporter (DC50X) Setup Box in order to get access to the channels.

Vista recognize the Setup Box Remote, but it's not capable of changing the channels by the Microsoft Remote.

On that page: http://mythtv.org/wiki/MCE_Remote I have the 3rd remote from the left.

I contacted Pace (the maker of the Setup Box) with the following reply:
"The DC-50X uses a new remote protocol called XMP. Check to see if it can emit IR codes using the XMP protocol.
If the Microsoft remote your using do not emit codes using XMP protocol it will not work with the DC 50X."

Does somebody know if the Microsoft Remote is capable of using the XMP?

Can somebody know how the Media Center make the setup box change the channel?
It look like it's using the IR (because of the additional IR Step with the Setup Box).

If you have a WMC working with the DC50X, what is your setup, which version of the remote, whats is your hardware setup?

my tuner (Hauppauge WinTV-PVR-500) can see the picture, the sound is fine.

Any help would be very appreciated.