You do not have sufficient permissions for incremental import, or the DirSync cookie stored in the user profile database ...

You do not have sufficient permissions for incremental import, or the DirSync cookie stored in the user profile database is corrupt. If you are importing from a Windows 2000 domain, check that the import account has the Replicate Changes permission for Active Directory directory services. If the import account has the permission, start a full import to refresh the cookie.