I am still having trouble. I have checked the threading to make sure its done as directed. I have double checked the bobbin casing it appears that its installed correctly, and that the bobbing thread is going in the correct direction. I tried hand turning the knob and moving the machine over the fabric and it appeared to be doing fine. Then I started using the speed regulator button and it appeared to be doing fine until the thread broke - URGH!!! So I re-threaded it and started again. I accidentally hit the button on the regulator when trying to pull up the bobbin thread - now the needle is stuck in the down position and I cannot turn the knob to get it up. It might be slightly bent at this point...