hello there i have an ipad 4 running on 6.1.3 i recently replace my ipad 2 for the 4 and i used to have an old icloud email now that i have my new email it ialways appear on top and ask me for password that i dont remember ,which it is i doesnt give the option as usual to delete what can i do ,how to update the email for icloud that is stack in my new ipad thank in advance for any help