Hi, I just got my Book Port last Wednesday and I have two questions. The manual said when the machine is reading, keys 7 and 9 move by page. This feature is not working so far. Does it only work when reading certain formats? I am reading a book I got from BookShare. The machine just beeps when I press the 7 or 9 key. Also, which keys make up the braille keys, the space bar, and the enter key? I couldn't tell when reading the manual. Thank you, Crystal