The plot thickens....decided my eyes could no longer take the strain of my Sony in artificial light, and with the cheap deals being offered by Barnes and Noble, decided to invest in a Nook. All was well until I tried to download a book from the library and install it on the Nook. Once again ADE 2 refused to co-operate. I got the book from the library, and managed to download it to the Sony, but ADE couldn't authorise the Nook. I tried everything I could find on the web....including deleting the ADE files off the Nook, but whatever I did it would not work. Finally, in desperation, I uninstalled ADE 2, hunted round for the older version (1.7 ?) and installed that instead. It came up, spotted my Nook (which I had accidentally left plugged in), said "Do you want me to authorise this?" (or words to that effect) and I clicked yes and away we went. One Nook duly authorised and now displaying my library book.
The moral of this story....ditch ADE 2 and stick with the old version. (I am running on Vista, the Sony is an old PRS-600 and the Nook is the Simple Touch Glowlight).
If anyone from Adobe is reading this forum...PLEASE, PLEASE no more versions of ADE unless you test them thoroughly and make sure they work before launching them on an unsuspecting customer base.