I used ADE once to download Library books and it worked fine about two weeks ago. When I downloaded more books to ADE a couple day ago, the ADE would not connect to Nook. I could not get the Nook selection to show up. Why did it work last time and not this time? I really need help. This has happened before. I had to re intialize my Nook. Then redownloaded ADE and it worked once. Now the books stay on the PC.