The spring on the hold open is caught down below. I am surprised you can fire it. As you push the spring forward, use a pin or something and slightly raise as you push it, it should click into place.
BTW, you didn't save any server space, you made 4 postings in one thread for four pictures
Seriously, unless you make an inordinate amount of blah blah postings, the server space by text is very small.