I just had (3) HR24 DVRs installed yesterday. I set the bedroom and living room remotes to RF without issue and also a third remote for "slaved" TV in another room. However, I cannot set the fourth HR24 remote to RF using the same method. I'm always forced to reseting it back IR via the front panel so I can use the remote control. One interesting thing to note is all of the remotes that did set to RF without issue were RC65RX. The one that didn't work was an RC65. Is there any logical reason why I can't set the third receiver remote to RF? Is there any work around to get it to work?