...unable to change Com1/2, Nav1/2 freqs. on most a/c - both default and add-on. Other aspects ( adf, xponder, altitude, etc.) okay....no 3rd-party a/c installed in last 10 or so days - all worked fine 'til I fired up FS2K2 this a.m. with a/n result....'preciate receiving help for a fix on this.legrinch

Open the aircraft.cfg file of the aircraft you are having problems. Check the &l;radios&r; section of the file. If you don't have a radios section, copy one from one of the default aircraft that has the same type panel, i.e., active-standby, active-only.If it already has a radio section, rename your fs2002.cfg file to fs2002.cfg.OLD. Restart fs2002, select the problem aircraft, try to adjust the radios. If ok, then update your setting for the new fs2002.cfg file and delete the OLD file.