Problem threading bobbin on Singer Touchtronic 2010?

My Singer Touchtronic 2010 stopped threading the bobbin like it used to. When you replace the bobbin you're supposed to pull the thread around the flat spring toward the right and by turning the wheel toward you there's an automatic (mechanical) movement beneath the bobbin that pulls the bobbin thread under the plate and enables the needle to catch it and pull it through the plate. That mechanism that pulls the bobbin thread around and through the plate doesn't move anymore. Is there a reset or do I need to take the machine in for servicing?

John
November 2007