Hi - before reading any further please note - I am a COMPLETE newbie, Dragonfly 36 arrived yesterday and interface cable today. So, I've probably flooked it.
I have the above heli with the standard Walkera Tx with the funny S-VHS type connector at the back. The Tx was damaged on arrival (minor - the spring for the roll control was missing) so I had to fake one using an old biro. Probably nothing to do with your problem but it proves I had to remove the back and poke around the innards (yuch).
I also ordered from
www.milehighwings.com their PIC interface cable which includes an adapter (to plug into the S-VHS female socket) suitable for Walkera 22E, 35, and 36 6-ch transmitters. Cost (at time of writing) $24.99 including a copy of the freeware simulator FMS with a whole bundle of added models on CD.
Their CD comes with basic set up instructions but basically it was very straight forward. Plug RS232(9-pin) plug into PC (running Win XP BTW), plug other end into back of Tx, remove crystal from Tx (to save batteries and stop knocking down other R/C craft in the area), switch on Tx. Start up FMS and go via menu bar to Control - Analogue controls - select PIC-interface. Select Mapping/Calibration and enter 42314231 from top to bottom in the lect screen, and toggle the Inverse settings of Rudder, Aileron, Tail and Roll on. On the right side click calibrate and follow on the intstruction about 1. rotating all the Tx controls through their full range and 2. setting all controls to their central position and clicking again. Finally, click on Model on the menu bar and look for the "dragonfly.par" model.
Please note that I did not make any adjustments to RS232 settings etc, and everything worked perfectly first time (except I can't fly - but that's my problem).
Great heli, great simulator!