Nook Color Registration

You can register it to any b&n account. B&n accounts can be created with any email address. Sounds like you are leaving out some key details to your issue. Are you just rooted and logging into android (google) or are you not rooted and registering to b&n?

 

So did "erase and de-register".
Define unable to register, what does it do?
Did you reboot after de-registeration? What did you see when you rebooted?
Did the welcome menu start, pick wifi, enter b&n account?
Did you check this new account online to make sure it's good and functioning?

 

Again, did you go online and check the account in question? It may not be your NC but the new account itself.

 

Ok, do the "erase and de-reg" again, reboot.
-Don't enter any account.
-Log online to both accounts and see if the Nook is still reg'ed to old account (listed).
-If so, remove it.
-Then you should be all clear to reg NC to new account.

I have not done this myself but I know my account online mist my device, so there is most likely an error in their system if a device is already registered (listed) to one account and you try to re-reg it to another. good luck

 

Nice, glad it worked out. Are you going to root your NC now or hold off?

 

Nice post you have linked there, good steps for someone new.

 

I may want to quote your post when people ask in what order of rooting and installing should they proceed with their new Nookcolors.