I have recently had trouble tuning my NAV1 and NAV2 radios. I click with the mouse to change the frequency under the radio pop-up box but it will not change. Please help.

mr. namelessThis is usually caused by starting cold and dark in a default plane with the Avionics Switch off. You can also assign a key to the Avionics Switch in FS assignments so that you can turn it on.David.