Hello Miriam, Still no joy here. I have the bobbin placed exactly as your picture shows. when I screw down the throat plate the hand wheel will not move. When there is no bobbin or throat plate everything moves. Thanks for your help.
on a happier note I was able to do free motion quilting on my Singer 15-91 dated 1935 , which i bought at a garage sale for $18.00 cabinet and all. I may have to take my FW in for service.