I looked on the Adobe website to see if I could find a list of my registered devices (could not) to try to help Gremalkin with the same problem you are having, thinking it might be a question of too many registrations. Anyway, I looked up Code 9 while I was there and found something saying "try again in 24 hours." So I think Emusan is correct in thinking there may be something wrong with the Adobe servers at the moment.
Good luck, and welcome to MobileRead!!
