Has anyone managed to get one of these radios to Scan. I have both a 510 and 610. Have programmed them with a number of channels which I have added to a scan bank. I have programmed a button to Scan Start/Stop. I can select the various scan banks but neither radio will scan. The display reverts to the last channel used used after a few seconds and clearly isn't scanning. A friend who has a couple of these sets has the same problem. Any ideas or any examples of an .icf file where the scanning function works?