I'm using pactor dragon 7400 with radio ICOM 706 , I have some troubles in modifying the frequencies via terminal Airmail soft ware . If I change freq. in the PC , the radio does not change freq. The radio ICOM 706 is not in Airmail set up . What can I do ? Tanks

Make sure you set up the correct "CIV" address within Airmail. You can find the setting clicking Tools->Options->Connection within Airmail. The CIV address should be mentioned in your radio manual if you did not change it. Also make sure you choose the right connection type: "Radio Connection" via "PTCII" or via "COM port".... if its via comport, choose the right comport. Mostly its com3 or com4 .... but may be also com1 or com2 if you do not use a usb to serial adapter but a real serial connector instead.