A friend of mine just bought dx4win and he has IC-781 with RS-232 connection to PC. (PC with "genuing" RS-232 port) N1MM works perfectly with same PC and cable to radio but not DX4WIN. Baud rates and address ( 26 ) are OK. Should the RTS and DTS be OFF or ON by default? With 300Bd it worked for a few moments but then nothing. Any ideas? Olli OH6CT