RC Super Cub controls

I have recently purchased a RTF Super Cub (4 CHANNEL) which I have managed to fly competently with the simulator that came with it. However, after waiting for the wind to drop I went to fly the plane but the controller channels are different on the plane to what I set on the simulator. The left throttle stick if I move it left to right it is controlling the elevator which should be on the right control stick. I've convinced myself that I've put the rear section of plane together wrong but I've looked at the diagrams in the instruction booklet and I've followed them as described. Is there something that I have done wrong, or how do I adjust the controls?