Remote control volume buttons - DirecTV DVR

For DirecTV TV services which include DVRs and receivers, Remote control volume buttons I'm having a strange problem: After unplugging all my TV-related equipment to protect it against some sever weather, when I set everything back up, my remote wasn't working, though lights were coming on when I pushed buttons. I tried everything I could think of and ended up reprograming the remote to the TV. Having done that, everything on my U-verse remote seems to be working--EXCEPT the volume controls. Anyone have ideas about what might be going on and how to fix it?