I just started having a similar problem with my remote this morning. Controls the TV on/off just fine, but won't communicate with the box. I changed the batteries, rebooted the box, and nothing works. The LED indicator turns from green to red when I push any buttons other than "TV". Is there a fix for this? I'm not sure why it would still communicate with my TV and not the cable box?
Did you ever resolve this issue with the remote? I'm having the same problem. Changing batteries didn't work, neither did resetting the box. It works for the TV on/off, but the LED turns from green to red when any other buttons are pushed.
the green/red means the box needs to be rebooted (after a firmware update). the profile for your RF paired remote did not properly load on that set top box restart.
edit: combined your cross-posts.