First set mechanically the throws of the superficies with the provided horns (one hole down or up accordingly), then check that the high rates are at 100%, and that the throws are per the manual, once that you have set the low and high rates mechanically and checking in your radio that servos move at 100% when in high rates, leave the throws on your radio at the center (Trim also) then use the servo programmer and see if at the neutral throw of the servo appears 0%, if not, disconnect the linkages and set the servo at 0%, reconnect the linkage and see if when all sticks at neutral the servo is 0% if so it's done by now. After flying and trimming the plane you can readjust the 0% with the servo programming.
I hope this could be of help.