Make sure the camera is functioning (with camera image on-screen). Make sure the booklet is aligned correctly (the pages should rest in the recess). Make sure camera arm is fully extended and pointed at the booklet surface (the support arm and camera will snap into correct position). Adjust room lighting to avoid harsh highlights (from bright light or direct sunlight) or dark shadows. Make sure the short-cut code is not marked on or damaged. If necessary print a replacement page and re-check. Make sure the lens is clean.