the projector has the push down film loading, the motor and light work, but the film is not being moved. something must be missing that it will not catch the film and advance it. do you know what to do?

MARY C, January 2013

Sounds like the sprocket fork which comes out of the gate and pulls the film downwards one frame at a time has broken.
The fork usually has three spikes which come out and pierce the sprocket holes in the film and is usually at the side of the lens apperture within the gate.
Try Google for spares

Geoff in Wales, January 2013