I am trying to set up the Logitech Harmony One remote for my girlfriend's dad and I'm having a problem with the software. I set the same remote up on my system without any problems. When I add the DirectTV DVR it sees it no problem and adds it to the controlled devices list, but when I go to add the 'watch tv' activity, it tells me to add a device that can change the channel. What's the deal? It seems obvious to me that the cable box changes the channel. I'm confused.