Connected a new Roamio Plus yesterday, and today installed a cableCARD from Mediacom Cable. All channels are present in the guide. I can use the guide to select a channel to watch. I can record and playback a program from the guide. But I get C501 error from: - What to Watch Now - Browse TV & Movies Search returns a "Search results are temporarily unavailable". If I select Season Pass and other options from a program in the guide, a blank screen is displayed for a couple of seconds and then back to the guide.