I try "Start/Stop" with state "On-->Off/On-->Off" in External Control and it don't work. State "Off-->On/Off-->On" don't work too. Other two states work properly, but I need exactly "On-->Off/On-->Off" state. Program version 1.60(newest for download). OS - WinXP home edition. The same thing with both ports: integrated and emulated with USBSerial adapter.
And very interesting thing: on other computer via USBto Serial adapter all states work properly. OS - WinVista Home Basic.