When I download a book into the downloads folder, I then get on the book and copy. I then close it and open the cartridge and go to dtb open it and paste it and it does not show up. What am I doing wrong, hope this is a question that someone will answer, most of the time my questions are to simple that they don't get an answer and when I look at them most of them that I ask are pretty stupid if I just thank, this one I can not understand what is going on. Thanks all Don