I had the same problem yesterday and it was so frustrating having to remove all those stitches, more than once I might add. My problem was the top tension. I know that the manual says you should first get the bobbin tension set and as a result you really shouldn't have to mess around to much with the top but I have never done that, luckily for me I usually get it to work. I was having eye lashing and I get so upset when I find that. Good luck I hope you get this resolved!