Event 40961SPNEGO (Negotiator) help

Hello
I keep getting the following error on most of the Xp workstations.

Event Type: Warning
Event Source: LSASRV
Event Category: SPNEGO (Negotiator)
Event ID: 40961
Date: 9/29/2002
Time: 4:20:02 AM
User: N/A
Computer: WFG-LEASING-1Description:
The Security System could not establish a secured connection with the server LDAP/wfg-server-1.citadelmgmt.com. No authentication protocol was available.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Any help would be great