i can't open my account n change to my new ID (e-mail address)
how to change your ID on iCloud when your ID is your e-mail address?
MacBook Pro (Retina, 15-inch, Mid 2014), OS X Yosemite (10.10.1), 11,2
If your Apple ID is a non-Apple email address (i.e. not @icloud.com. @me.com or @mac.com) you can change it a http://appleid.apple.com - click 'Edit' next to the address.
However if your Apple ID is an Apple address you cannot change it.