Lilrain, I also have a Pfaff dsm and have done a lot of FMQ with it without any problems but recently when trying to do some grid quilting on a table runner, I had the same problem. Since the grid was straight line quilting I did not FMQ and I think I had the integrated walking foot engaged, but had the same problem. I just put it away and later will need to remove the stitches. I'm thinking it must be too much pressure on the presser foot. Very odd, I thought.