I use it most for audiobooks. when in the middle of a book, I pause, shut down and come back latter. When I get back to the book if it is more than 1/2 finished, the unit will not engage the sound, the wording (name of book) that scrolls by will be really slow, and it will take over 3 to 5 minents to start the sound if at all. sometime the unit will just shut down and start the book over from the begianing, if it works at all. What can I do to fix this? I have tried to remove all books and reload fresh. the battery is fully charged and books were loaded without a dissturbence. My clip 4 gig is about a year old. any help I wll be greatfull for.