The DNS server encountered an invalid name server (NS) resource record in zone file %1 at line %2. The use of NS resource ...

The DNS server encountered an invalid name server (NS) resource record  in zone file %1 at line %2.  The use of NS resource records (RR) must be  at either the zone root node or be placed at at the sub-zone context  within the zone for a domain being delegated away from this zone.  Although the DNS server continues to load, ignoring this RR, it is  recommended that you either correct the RR or remove it from  the zone file.  The zone file is located in the %SystemRoot%\System32\Dns  directory.  For more information, see "Delegating zones" in the online  Help.