If all 4 channels move correctly when calibrating about the only thing left is that you haven't set the channel numbers up correctly on the LH side of the mapping/calibration screen.
Or just one more possibility.....the model you're trying to fly may not have ailerons
![Wink ;)](./images/smilies/icon_wink.gif)
. There are quite a few 3-channel models for FMS.
Steve