Prism99

If everything fails, then likely it needs to be seen by a technician for adjustment of the timing.

DogHouseMom

Are you sure the needle is in the correct way? If it's backwards it can't pick up the thread because the bobbin hook can't hook it. The flat part of the needle needs to be at the back.

Helen S

Here is what could be a possible solution to your machine problem, with instructions, assuming nothing else posted above has helped.

http://www.managemylife.com/mmh/ques...-bobbin-thread