Can anyone tell me what is wrong on my XT when it trims and the threads springs because it is tight and pulls out of the needles? It does it on all needles, I have changed bobbin cases and checked them, checked material thickness, etc and whatever else I need to do naturally and it still does it. It sewed good all day on the same design and just started this with the last 5 garments. PLEASE help me! Thanks!@