I finally got around to getting out a Singer Model 15 that I rescued from the side of the road several years ago, It is in great condition, got it all lubed and cleaned up some, but I can't get it to sew properly. This machine has the sideways bobbin (a first for me), I cleaned up that whole area and re-threaded it several times. But when I try to sew, it takes 2 or 3 stitches and no more. I can't tell if the problem is with the bobbin side or the top side. It seems to be breaking the top thread sometimes, and then sometimes just goes along with both attached but not making stitches. I guess this isn't a very good explanation, but the best I can give. Anyone have any ideas? I've done allthe usual, new needle, re-threaded both top and bobbin, but still have the same problem.