I am having problems with frequency changes with the copilot. When I get to the runway I turn communications over to the copilot. I get clearnce and take off. When I'm told to contact approach or depature nothing happens. Copilot does not change frequencies. Even if I try to change manually nothing happens. What should I do to fix this?

what plane are you flying?

I am flying the Pharaoh Air 757 with the Lonny Payne panel.

Since that's a freeware panel, I don't think there's anything off about it, like a different radio.Does this happen a every airport that has Dep? Does it happen when contacting anyone else? Are you sure you have files in all the winwood2 to winwood10 directories (or 12 if you have both add-on controller sets).