Just received a Dragonfly helo with a serial cable and was trying it last night with no luck. I have FMS and pre flight . My control has two extra swithes on the top of either side(I've heard their not connected inside) and a soft button switch on the top right, similiar to the trainer switch on some futaba transmitters. I've configured the serial port as per the FMS manual and make sure the transmitter is on before I start FMS, still no joy. [:@] I read a thread in another forum that talks of a red switch that allows the computer to see the transmitter. The only thing red I see is the dip swithes on the back of mine. I currently run Windows XP w/ service pack 2. I also heard that you need to run FMS in windows 98/me format and it should work. Haven't tried that yet. Any help is appreciated. Also my joystick (USB) works great with the FMS.