New PCB Servo help needed

[eetoi]

I finally got enough time (of all days, on my birthday ) to install my new PCB because I burned the old one... I soldered in the batts and the servo correctly, but when I tested it, the servo only turned in one direction and while in neutral and attempting to turn the other way, it seemed like it was struggling and couldn't move at all (it made that light buzzing sound, you know, like when you restrict your wheels from turning but turn the steering wheel anyway). I'm guessing this is only because of different factory settings for the PCB and controller, but how do I adjust these? If I adjust the trim on the controller, it'll reset after I turn it off, and I can't turn the little gears inside the servo past a certain point... I'm at a loss here, I haven't driven my xmod in a few months! please, help would be appreciated.