19200 works best for me. First go into Windows and make sure your com port is set AND the baud rate is at 19200. Then make sure youy have the radio set at 19200 also. In win xp, , go into system, then device manager , then see if yoiur adapter is recognized and what com port its assigned too. If not, re-install the drivers again.Then if your using Freescan, go into scanner, control scanner and see if your comm port is recognized . The cable and comm port should work now.