Numerous 566 errors

I have numerous envent id 566 errors in my domain controllers envent Logs. I have copied one of the errors below. Can any one help me out?

Event Type:	Failure Audit
Event Source:	Security
Event Category:	Directory Service Access 
Event ID:	566
Date:		7/14/2009
Time:		12:50:50 AM
User:		BURNHAMWOOD\BWCSAS01$
Computer:	BWCSDC01
Description:
Object Operation:
 	Object Server:	DS
 	Operation Type:	Object Access
 	Object Type:	dnsNode
 	Object Name:	DC=BWCSAS01,DC=Mydomian.org,CN=MicrosoftDNS,CN=System,DC=burnhamwood,DC=org
 	Handle ID:	-
 	Primary User Name:	BWCSDC01$
 	Primary Domain:	BURNHAMWOOD
 	Primary Logon ID:	(0x0,0x3E7)
 	Client User Name:	BWCSAS01$
 	Client Domain:	BURNHAMWOOD
 	Client Logon ID:	(0x0,0x38937DAE)
 	Accesses:	Write Self 
			
 	Properties:
	---
		Default property set
			dnsRecord
			dNSTombstoned
	dnsNode
 
 	Additional Info:	
 	Additional Info2:	
 	Access Mask:	0x8
 
 
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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