kozak737

Hi, I am using my jetliner for more than one year. My computer was a little old under Win XP and FSX without any problem. I decided to change computer and use my JetLiner but under Win 7. I installed the latest drivers FSUIPC and PFCX drivers and USB to Serial drivers (prolific) When I try to fly everything is normal and after a few munites the radio buttons stucks and I cannot change frequencies. I tried to find out what is problem but unfortunately I cannot. What I remarked when I turn the frequencies on the jetliners the led change in the fsx but on jetliner show freeze. I suspect that maybe is a problem of port drivers but I am not sure. Thank you for your help Constantinos