It sounds like you probably have the needle inserted correctly and threaded properly, otherwise you could not have brought the bobbin thread up. It is possible that the bobbin is not threaded correctly. It needs to go under the spring and at the right tension. A common problem with some of these older machines is that the tail 3-5" ends of the threads need to be held when starting to sew. A member of the "Colorado Get-together" group has the mantra "Needle down......foot down......sew!" You still want to have some thread behind the needle.
I would still like to see some pictures of your machine and the bobbin area and case.
Janey - Neat people never make the exciting discoveries I do.
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