We have about 8 Motorola GP340 radios which do not seem to do anything except make loud beeps. If you put them all on channel 1, and press the talk button, nothing happens, no sound is heard or anything. I suppose I need to program them? I have found some ancient Windows 98 software but i'm not sure if this is the correct thing to use. The software is Motorola Professional GP300 CPS, which doesnt seem to do much when I have it plugged in. I am using a USB to Serial adaptor.