Hello to All.I'm not able to change the frequencies on the NAV or COMon one of my acft. The Vistaliners B272-200F.All other numbers; AP, Transponder, ADF will change.I have several (12) different aircraft I've added to FS9 andall acft frequencies will change, no problems. Only this B727. I have FS update installed, FSUIPC 3.74 installed, I reinstalledthe Vistaliners B727 twice thinking some data might have missed.Still not able to change the COM or NAV freq's. The COM freq will change when I select a GC or Tower position from the drop down window.With that all said...can anyone help?Thank Youez_flyer

EZ_flyer, open your fs9 config, scroll down to the [RADIOS] section and make sure Com.1 thru Nav.2 have ones and zeros as shown below. That should solve your problem.[RADIOS]// Radio Type=avail?,sby freq?,glide slope?Audio.1= 1Com.1 = 1, 0Com.2 = 1, 0Nav.1 = 1, 0, 1Nav.2 = 1, 0, 0Adf.1 = 1Transponder.1= 1Marker.1= 1Hope this helps,Bob

BobThank you very much!!!That did it.There were no "0" in the original code.I had tried to copy and paste the B737 config, radio type, which was a bit different than the B727. You had the correct code.Again Thanksez_flyer

Glad to help.Bob