Also sometimes if the image is too large it won't print using the built in PDF creator, so we use a 3rd part PDF print driver like PDF XChange to print PDF's. Also if you are inserting actual .BMP files, try saving the images to a different format like .PNG or .JPG and inserting that file instead as they should be much smaller.
Thanks! - Josh Do. Or do not. There is no try. Josh's Digital Downloads is come back online soon. Stay tuned. (soon is a relative term)