Q: Changed Apple ID

Hello Lyn,

Thank you for the details of the issue you are experiencing after changing your Apple ID.  Have you tried the following steps to change the logged in iCloud account on your iPad?

On your iOS device’s Home screen, go to Settings > iCloud, then at the bottom of the screen, tap Delete Account.

iCloud: Change iCloud feature settings

http://support.apple.com/kb/PH2613

Once you have signed out, you can sign in with your new Apple ID.  If you are unable to sign out of your old Apple ID, this article may help:

iOS 7: If you're asked for the password to your previous Apple ID when signing out of iCloud

http://support.apple.com/kb/TS5223

Additionally, try signing out of Game Center in Settings > Game Center by tapping on your old Apple ID and then Sign Out.  Then you can sign in with your new Apple ID.

Find more information here:

Using Game Center

http://support.apple.com/kb/HT4314

Thank you for using Apple Support Communities.

Best,

Sheila M.