1996 Ford Contour Power Steering

I have a 96 contour that just had a line spring a leak, it was not driven with out fluid as all the fluid leaked out overnight. After fixing the line and adding new fluid the power steering now does not work. I started the car and turned the wheels back and forth to push the air out, drove it around the block, but the power steering still does not work and the resivior is still full. I took the line apart where it was fixed and fluid came out, I took the line going to the pump off and there was fluid there. I do not understand why there is no power steering, can anyone help me? I don't want to just replace the pump if there is something else minor that I should do.