Window will not roll up and down

I have a 1991 ford tempo with a problem, the drivers window will not roll up or down. I can move the window by hand easily and when the switch is pressed you can hear the motor spin. I havent pulled the door panel yet because I would like to go in with an idea of what im looking for. So any idea as to what the problem could be?

The cable on the regulator is probably broken causing this. I would check local junkyards for a used one.