If that doesn't work, then I suggest you also post your questions here:
I have an iphone 4 and ipad 3.
Months ago I changed my email address and thus changed my itunes ID email and pw. When i went to activate i cloud recently my original itunes email keeps popping up. When i type the original password i get the message that its wrong and asks me to edit. When I go to settings i can not edit the email address but only the password. So although the current email/ID/pw work with everything/all apps perfectly, i cannot activate i cloud and i cant get rid of the old email. Any advice would be highly appreciated.