LsaSrv Event ID 6033

I have CPS installed on a Windows 2003 R2 server w/ SP2 and I keep getting the following event in my error logs:
Event Type: Error
Event Source: LsaSrv
Event Category: None
Event ID: 6033
Date:  3/3/2008
Time:  9:00:18 PM
User:  N/A
An anonymous session connected from XXXX-BACKUPS has attempted to open an LSA policy handle on this machine. The attempt was rejected with STATUS_ACCESS_DENIED to prevent leaking security sensitive information to the anonymous caller.
 The application that made this attempt needs to be fixed.  Please contact the application vendor. As a temporary workaround, this security measure can be disabled by setting the \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\TurnOffAnonymousBlock DWORD value to 1.  This message will be logged at most once a day.
CPS is the only program running on this server, so I'm assuming CPS is what is causing the error. Everything 'seems' to be working fine. Is there a fix for this? I would rather not allow anonymous logins if possible.