DNS server not authoritative for zone.

[wmin]

My System Log if full of NETLOGON errors, here is 2 samsples. Client workstations constantly complain that they are unable to determine computer or user name. Smells like a rat. Who knows better?

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Event Type: Error
Event Source: NETLOGON
Event Category: None
Event ID: 5774
Date: 12/10/2004
Time: 20:26:49
User: N/A
Computer: GRI2

Description:
Registration of the DNS record '_kerberos._tcp.americaneuropean.com. 600 IN SRV 0 100 88 gri2.americaneuropean.com.' failed with the following error:
DNS server not authoritative for zone.
Data:
0000: 31 23 00 00 1#..

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AND
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Event Type: Error
Event Source: NETLOGON
Event Category: None
Event ID: 5774
Date: 12/10/2004
Time: 20:22:47
User: N/A
Computer: GRI2
Description:

Registration of the DNS record '_ldap._tcp.Default-First-Site-Name._sites.gc._msdcs.americaneuropean.com. 600 IN SRV 0 100 3268 gri2.americaneuropean.com.' failed with the following error:
DNS server not authoritative for zone.
Data:
0000: 31 23 00 00 1#..