pt92 difficulty in reasambeling

Hello out there. I just purchased a new pt92 stainless. I love shooting this gun, and really like looking at it. I have only put a couple of boxes of shells through it so far. The problem is, it is difficult to reassemble the slide back on the frame. ( seems to bind about half way back on) Am I doing something wrong, or will it get easier as I put more rounds through it? Thanks. I really enjoy the blog.