I would also suspect doing what Sunday748 suggests above will fix this.
Or go to the best place (imo) in this forum for A310 info: [Official Discussion] Airbus A310-300
Or, finally (but most importantly if you haven’t already) watch the inibuilds videos for differences training, assuming you already fly a different airliner, or for the basics if you don’t. Links to to the videos are on the inibuilds website.