At the top of the table of tuners in TV Server Configuration (TV Servers -> <your server-name>) is a setting for "Number of IPTV cards" that's initially set to 1. Change that number and restart the TV service. Then go to TV Channels -> TV Mapping, find your new IPTV "card" (i.e., MediaPortal...
I have the HDHR Connect Duo. You may not be able to do this with the HDHR Prime, because I don't think it's supported.
The first thing to do is make sure your firmware is up to date, so be sure you have the latest software installed (which will also update the firmware).
Check the channel...
I was messing with it and finally figured out how to map the channels so Mediaportal would recognize them. Once it was set up, it seemed to work as well as the cable or over-the-air channels that the HDHomerun delivers. Recording (both manual and scheduled) and playback worked just fine. Or at...