he's talking about the same sim... HeliSimRC.. I know that a lot of people with the esky 6ch tx had a lot of problems with FMS as well as other sims.. they had to disable the CCPM mixing on those to getr it to work... might be something along the same line since the TX does CCPM it could be confusing the signal.. but I don't know for sure... I use teh esky sim TX... got it and FMS for 19.95 then grabbed HeliSimRC because FMS is not very good at all....