#1 remote is IR and the #2 is UHF, is there maybe something blocking the IR receiver on the 722? The other thing you might want to try if that is not the case is to try another IR address. If I remember correctly to change that, put the receiver in standby, on the front panel of the 722 hit the system info button, you should see a System Information screen on the TV. On the #1 remote hold the Sat button until all the mode lights flash, pick a different IR address by selecting the number on the button, hit the # key, then hit record (Hopefully I have the steps right, trying to remember them off the top of my head).