I have a Logitech Harmony 1100 that won't communicate completely with a Charter cable hd/dvr box. The cable box is stored in a closet along with the Logitech Harmony RF Extender. I press the icon that turns on all the components to watch tv and everything comes on fine, including the cable box. But that's it - it won't control anything else when it comes to the cable. I can't change channels or go to the guide or on demand...nothing. But it has no problems controlling the volume on my tv or on my sound bar or even going to my smart tv hub. I have spent several hours reconfiguring the setup on the Logitech program and updating the remote, but nothing seems to work.