I am having trouble programing a new Pro 652 Radio Shack scanner. I am using WIN 500 to program this radio as well as a pro 197. On both radios after I download the frequencies from Radio Reference, I get no signal from any of the frequencies and when I go to the monitor mode on either radio it shows that all of the frequencies are muted. I have looked at both manuals and neither on has anything about mute, Does anyone know how to get the mute turned off on these radios?