You said you do have it secure but just to be sure make sure:
1. that there are no threads anywhere on the edges.
2. don't start at the edge of the paper put your fabric back a bit from the edge so the paper hits the feeders first.
3. make sure your paper is flat and straight. If it just got pulled from the roll it will curl when it goes in even if it seems flat. (stack books on it overnight to flatten.
4. try running a plain paper first then the freezer right behind it that way it doesn't have time to think. LOL
Hope you figure it out.