Dear all,The server was setup for three years but it often shows error when calling the webpage with asp/aspx recently. Any ideas? (The application pool is using Network Service account)Here are some event logs:Log A================Event Type: ErrorEvent Source: UserenvEvent Category: NoneEvent ID: 1053Date: 10/15/2009Time: 11:33:03 AMUser: NT AUTHORITY\SYSTEMComputer: WEBSERVERDescription:Windows cannot determine the user or computer name. (The system detected a possible attempt to compromise security. Please ensure that you can contact the server that authenticated you. ). Group Policy processing aborted. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.================Log B================Event Type: WarningEvent Source: LSASRVEvent Category: SPNEGO (Negotiator) Event ID: 40960Date: 10/15/2009Time: 11:42:08 AMUser: N/AComputer: WEBSERVERDescription:The Security System detected an authentication error for the server cifs/MyDomainController. The failure code from authentication protocol Kerberos was "No authority could be contacted for authentication. (0x80090311)". For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.Data:0000: 11 03 09 80=================

The web site, is run with application pool isolated?Or default? You can write the security the web site (tab security, windows auth. anonymus,ecc).? Thank's Valerio

Valerio,Thanks for your reply!No. It ran from another application pool I created. So, the normal http service is still functional (i.e., normal html page is using the default application pool) during the time.Actually, the vd is connecting to the data (source code) by UNC path to our network file server. A domain account was created for this connection (by changing the "connect as..." to my domain account). This account has the read permission in the file server like normal anonymous account does.Besides, both the applicaion pool I created and the default applocation pool are using "Network Service" specified in "Identity". Alan

Do you can post the screen shot the configuration the virtual directory ?(example; execute permission, and ecc.) Do you can explore the unc with application pool users? Valerio Lorenzani MCP

Hi, Regarding the IIS-related issue, I suggest that you post to the IIS forum. The forum is a better support pool to assist you: IIS forum http://forums.iis.net/ Thanks for your understanding.This posting is provided "AS IS" with no warranties, and confers no rights.