Hoping that 1000scraps has shown you how to work the "levers" and that it fixes your problem. You do have to work them properly to get them to work as they should. Recently I had a problem with my Pfaff 7550. The foot would not stay flat on the machine bed ... it had some vertical play in it so it wouldn't hold the fabric flat on the bed. Turned out the spring in the foot mechanism had to be replaced. I suppose it had just worn out.