Pella Roller Screen Handle Latch

My latch won't go back into place once the knob has been engaged to open the screen making it unable to close. It would seem like there should be some sort of a spring mechanism to ensure it comes back down to close. I am assuming that its in the piece that is in the wood edge part of the screen seen in the last picture? Any help you can provide would be greatly appreciated!

I believe those are just the handles? I am also looking for the door hook latch and the metal insert that goes into the screen edge.