Try moving the aileron trim to the right. If you go nearly all the way to the right, you will have to adjust the length of one or both servo connecting rods. The swash plate has to "lean" abit more to the right on yours, so lengthen the left rod and/or shorten the right by one turning one end of the rod and then center the trims and try again.

Start with the trim TAB (on the transmitter) first, though.