On the 811 reciever. Press Menu 6/1/3 for system information. You should see remote address on bottom of the screen. On the remote for receiver, press and hold satellite button until all lights come on, then let go of satellite button. It should now be blinking. Press 13#, wait for light to shut off, then press record. You should see the address change to 13.
You can check the address on the 625 the same way, by going to system information screen. Just make sure the UHF remote addresses aren't the same.
