Coup de Etat: No reply on Red Radio in Mission 1?

[Eisprinzessin]

Wanted to play the campaign again after a year

 

But now, i struggle to get an radio check reply on the red radio in mission 1. Green works, but red doenst.

Anything changed because of updates?

[Eisprinzessin]

Really nobody with this Problem?

[chips]

I have flown it yesterday and everything was ok.

[Eisprinzessin]

Yes it works. I guess i was dumb in any way.

But:

At the beginning on the Airport it is cool, but while in the air the comms a very low on volume, no?

I already turned up Radio Volume to max but its hard to understand because the Mirage is so loud...