Well it is just so maddening when you are ready to sew and the stupid machine does not cooperate, lol! I never want the machine to "win" and get the best of me. I've almost thrown a serger out the window too. Presser foot up when threading so thread is in tesion discs and stays and if not using both needles remove the one not in use. Good-luck! Let us know what the problem turns out to be so we can all learn.