HELP!! I am using ADE 2 on Windows 7 and after 2 problem-free years, now when I try to transfer books I've downloading from libraries to my PC over to my NOOK I'm having problems. According to my PC, everything's went fine. The books are showing up on both PC and NOOK. But when I (safely) remove the NOOK from the PC, the books do NOT show up on the NOOK. Where'd they go?