I am a librarian in a public library. We direct patrons to use Overdrive to access ebooks. Overdrive has a help page that says, "Adobe allows you to activate up to six devices using the same Adobe ID. If you've reached the activation limit for your account, contact Adobe Customer Service and ask them to reset your Adobe ID." I downloaded a book on one computer in the library. It opened fine. I tried to access this book on a different computer and I got an error message saying that my computer was not authorized. I have not activated more than six devices. Please advise me on how to resolve this issue.