I have the RC64RB and it's incredible that the IR outperforms the RF. The RF needs to be activated in the recievers menu of course. It's not that the RF won't work, it's that in RF the remote needs to be more accurately pointed at the antenna than does the remote when in IR. Believe me, it's hard for me to believe too. I haven't complained to DirecTv yet cuz the IR does work real well and I'm more than happy with just that. I just thought I'd mention this RF quirk to see if anyone else is having this issue. As an afterthought, I do have a HTPC sitting on the top shelf,,, just above the HR20-100s receiver. Maybe that's causing some sort of interference? Just a thought,,,,
Robin