Downloaded library ebooks

[Albert1944]

I have been using ADE 4.5 for more than a year and had no problems but now one book will not open on my Kobo saying that it is not authorized. I have tried deleting it and reloading it but it will still not open. Other books that I have downloaded before and after have no problems. Can anyone explain what I am doing wrong.

[Albert1944]

I have now found that when I downloaded the book to ADE that it was downloading three copies of the same book so I tried borrowing and downloading a different book from the library and then the book I was having trouble with. Lo and behold everything worked normally.I don't know why but something worked.