I've only recently started using my Sweet 16 after owning it for a few months. I'm about 3/4 of the way through quilting a quilt, and I stopped for the night. THe next night, I changed thread and the machine won't work. I get a Motor Speed Sensor Failure. I've turned off the machine. I've unplugged it, I've changed the thread back, I've put in a new needle, I've oiled it, and I've said many curse words. All to no avail. Is there anything I can try before I load it up and drive an hour to the nearest dealer? It was working fine one night, not at all the next.