Audible Authorization Issues Since iTunes 10.4
Quit iTunes on every computer you own (probably not necessary but can't hurt).
Contact Audible.com support and ask them to de-authorize every device associated with your account.
Go back into iTunes and re-authorize.


I've been an Audible customer for years and they have some of the best customer support in the entire tech industry. You can contact them via Email or phone:


1-888-283-5051 (US &amp; Canada)
1-973-820-0400 (International)