Hi, since today I am not able to change frequencies manually in the standy radio. I started a flight in EPWA and it was not able to contact CtrDel. I am now since 48 min in the air and I did restart the program but still no chance to contact e.g. Prague Ctr as the frequency doe not change. 

Regards Roland

It is possible that the plane you are flying does not let external programs change frequencies and you will have to change them in the cockpit.  That is very common, especially in 3rd party airline aircraft.  

Some of them have an option you must enable to allow external programs to communicate with them.

Dave

Thanks Dave; it is working now again.

Roland