RE: I dont know?
OK lets try to figure out what you have with a simple three channel airplane like that does the transmitter have a single stick that controls the rudder and the elevator, or are the rudder and the elevator controlled on two separate sticks.
What we need to know is what each control on the Tx does and which direction is it moved to move which conrol surface which way. And, is this different than what you have on that Sim.
John