Error C085843B when changing domain name.

[davwil00]

I have been trying to swap my primary domain which was previously a parked domain. I have removed all references to it in CPanel but it would seem that it there is somewhere I have missed as CPanel still gives me the option of using this domain i.e. in email addresses.
I am trying to use davwil00.co.uk as my primary domain and davwil00.co.cc as my parked domain but when I try and change the primary domain I get the C085843B error.

[Anna]

Please try now, seem the entries for that domain still remained on the name servers, which would cause it to fail when trying to add it to the account again.

[davwil00]

Thanks, this is sorted now.