Window regulator problem

My door glass fell into the door and now the regulator seems to be stuck in the up position. The handle won't move it and I reached into the door and grabbed it and it still won't move. The glass will move. The plastic button was laying in the door as was the slotted piece that goes on the roller.
What's holding it?
72 Dart hardtop
Also before this happened you could push the window down from the outside with no resistance.
Thanks Bruce