As well as resetting its password did you also do :What to do after you change your Apple ID or password ?
If you did, contact iTunes Support : http://www.apple.com/support/itunes/ww or https://www.apple.com/emea/support/itunes/contact.html
You can make a difference in the Apple Support Community!
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
As well as resetting its password did you also do :What to do after you change your Apple ID or password ?
If you did, contact iTunes Support : http://www.apple.com/support/itunes/ww or https://www.apple.com/emea/support/itunes/contact.html
How to enable your Apple Id