XP Laptop Constanctly lockign out ad Account

Hey, I am running into  a critical issue with a laptop of a very important user.  The laptop lockouts the account very frequently since the user changed his password with the event ids below .



Event Type:      Warning
Event Source:      LSASRV
Event Category:      SPNEGO (Negotiator)
Event ID:      40960
Date:            5/23/2008
Time:            1:42:44 PM
User:            N/A
Computer:      xxxxxxxxxx
Description:
The Security System detected an attempted downgrade attack for server cifs/xxxx.xxxxxxx.xxxxxxx.com.  The failure code from authentication protocol Kerberos was "The user account has been automatically locked because too many invalid logon attempts or password change attempts have been requested.
 (0xc0000234)".

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


Event Type:      Warning
Event Source:      LSASRV
Event Category:      SPNEGO (Negotiator)
Event ID:      40961
Date:            5/23/2008
Time:            1:42:44 PM
User:            N/A
Computer:      xxxxxx
Description:
The Security System could not establish a secured connection with the server cifs/xxxxx.xxxx.xxxxxxx.com.  No authentication protocol was available.

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


Does anyone know how to resolve this on one machine?