DNS Errors

I continue to recieve the following DNS errors and i was wondering if anyone knows how to resolve them:

Registration of the DNS record ‘gc._msdcs.firebug.lifesafety.com.au. 600 IN A 192.168.0.5’ failed with the following error:
DNS server not authoritative for zone.

and

Deregistration of the DNS record ‘gc._msdcs.firebug.lifesafety.com.au. 600 IN A 192.168.0.1’ failed with the following error:
DNS server not authoritative for zone.

Thankyou Heaps
Eli