Hello, need help, when I want to change the frequency on the left side to for ex. 135.220 its there is an ERR on the radio panel. This frequency is needed for the app on vatsim at LSZH. But its the same, when I`m not connected to vatsim.
Some frequencies working, some not. There comes an ERR on the radio display. Whats the reason or whats going wrong?
Thank you for any help.
Volker