Door lock issue

I have gutted and replaced the inner door stuff on my 69 Barracuda Fastback twice. It sounds like something is hanging up. Does the latching mechanism work OK for just opening and closing the doors? Here is what I would do. First, I would make a good sketch of where all the rods go and how they pop into place. Then disconnect the rods from the key lock and the push button lock. If they both work smoothly now, the problem is in the latch (most likely). Then take the latch out and inspect it. They are quite basic in their operation. after a few minutes of playing with it, I can almost guarantee that you will see how the mechanism works, and you will figure out where the problem is. I bet it will be something you an take care of yourself.