When i try to correspond with the ATC (starting at EDDV) the ATC does not respond. The radio panel is on. I even can not change the frequency with the mouse.

When i start for example at Boston airport i can correspond with the ATC and can change the frequency, but during flight the ATC (radio panel is still on) the ATC does not get my selected answer and i can not change the frequency any more.

Has anyone a solution for this problem? Thank you.


Using Microsoft Windows Vista Home Premium