Did you Buy the machine locally? Can you take it to where you bought it and let them see the problem? I have recently discovered that my Janome eats Schmetz needle but sews like a charm with Dritz. But you said these were the needles that come with the machine, so it might really be worth a trip to the dealer. This happened to me a while ago with my Necchi and it was all about the "timing" Good Luck!!