Need help with Music Class skirt

Hi! I'm trying to assemble the pocket and step two has me confused. I did exactly as instructions state but it seems to short when I try to attach the pleated insert. I'm sure it's something simple but can anyone explain it to me? I've included a photo to show how it looks after I edge stitched and matched the edge stitched piece to the notches with the line/larger dots. The photo wouldn't attach. I'm so frustrated trying to figure out this simple step. :-)