Found the problem. I was using a power supply at 5.56VDC. For some reason it was fine for binding, but not for flight mode. Was thinking what was in common to this new "matched radio and receiver" and the 1-yr old Tx and Rxs. The power supply to the Rx was the only thing in common. So found an old ESC that wasn't an Opto and used it's power supply. GREEN Light!.