Now go back to the top metal guide. Push in the spring assembly into the end of the guide farthest away from the "hinge end" of the door. This should snap in by hand. Do not hammer, as it will break easily.
Now it's a simple matter of putting the door on! It may be helpful to have two people for this step. First insert the smooth pin into the top metal guide. Swing bottom of door into place so that the "ridged" pin rests in the L-shaped bracket. Don't worry about getting the roller pin in the guide yet.
Once the smooth pin and the ridged pins are in place, get on the ladder and gently force the roller pin into the metal guide.

