Error reconnecting to SQL Server thro 2003 server authentication

[pramodDR]

Hi

I am getting the following error if I leave my comp(WIndows XP Client)idle for approx 20 mins.Infact I am authenticated to SQL Server thro a 2003 server.PLease suggest what can be done.

Error message in the event log :

Event Type: Warning
Event Source: LSASRV
Event Category: SPNEGO (Negotiator)
Event ID: 40961
Date: 13/04/2005
Time: 11:42:06
User: N/A
Computer: ONMBLR-086
Description:
The Security System could not establish a secured connection with the server MSSQLSvc/Fin_Blr:1433. No authentication protocol was available.

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

Thanks
Pramod