This is probably way to late, since the last posting is from June, but I just purchased the Reflex XTR sim and I have a Futaba 7C radio.
Had the same problem, the simulator would not recognize that the transmitter was on and connected. Found the fix for this problem at
http://www.reflex-sim.dyndns.org/ref...qPath=15_35_40. You just have to remove 4 components from the patch cord. I did this and now everything works great.
Just thought I would post this for anyone else having trouble with the simulator working with the Futaba 7C radios.