My ipad has been erased and its asking me to activate it again but it won't let me use my original apple id or password. What can I do?

Were you using a different ID at the time you erased the iPad?

 Cheers, Tom 😉

Apple ID: Changing your Apple ID

http://support.apple.com/kb/ht5621

Using your Apple ID for Apple services

http://support.apple.com/kb/HT4895

Apple ID: What to do after you change your Apple ID

http://support.apple.com/kb/HT5796?viewlocale=en_US&locale=en_US

iTunes Store: Associating a device or computer to your Apple ID

http://support.apple.com/kb/ht4627

iOS: Changing the signed-in iTunes Store Apple ID Account

http://support.apple.com/kb/ht1311

 Cheers, Tom 😉

This doesnt help ^ Texas man