Good morning. i parked my machine last night after finishing a quilt. I started her up this morning, loaded a new quilt, put new bobbin in and broke a needle...inserted another, broke it again. Checked bobbin and oh my goodness, the black holder is loose and turning all of its own. that little black arm that I assume holds the bobbin in place is loose and detached. i tried to put it back in place and tighten it up, but the machine won't stitch.....what is happening, how did this happen and what can I do to fix it? Please...i am so backlogged with work, can't affort this down time.