Yeah, a bridge is what pittsburgpam called a leader. I don't know the technical terms, lol.
I'll try rethreading everything and see if that works. Maybe I'll try using a new bobbin too.
Shibori, I don't think it has a removable bobbin race thing-a-ma-jig, but I could be wrong. I'll see if I can figure that out.
Thanks everybody for the suggestions. I'm going to go try them all out. And if that still does work, my DMIL will have to look.