I haven't used my machine in several years. I started sewing with it today and once the bobbin ran out I went to fill it and start again...all was well until I looked under the fabric and noticed the lower tension was way too loose and have big 'loops'. I went to take the bobbin out and the whole bobbin mechanism came out. I put it back together, adjusted the little s***w on the bobbing to tighten up the lower stitch and all was fine until the bobbin ran out of thread. I filled it and put it back in, just like before and now the machine locks up on the third or forth stitch, the needle gets stuck down and once I manually get it up the tread is in huge loops under the material and down into the bobbin area. I have to cut the threads to get the material out. I have tried everything in the book that came with the machine but nothing is working. I've tried a new needle, different bobbin, different thread, adjusting tensions, upper and lower. Please advise
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