#3 - Oct. 19, 2010, 9:49 p.m.
Based on the information you provided, and what I have been able to determine by looking at the account, this seems to be an issue with the authenticator being out of sync.
If you do not know how to resync the authenticator, please visit this Knowledge Base article:
Battle.net Mobile Authenticator – Troubleshooting http://us.blizzard.com/support/article/27005 Scroll down until you get to the
“Resync vs. Reset” section and follow the instructions.