The sample of Kerberos can't run:The Kerberos credential handle could not be acquired.

From: znmaster (zengniu2001_at_hotmail.com)
Date: 01/22/05 

Date: Sat, 22 Jan 2005 20:28:16 +0800

After I set up WSE2, I ran the sample of "Kerberos" in the folder
QuickStart. I got an exception System.Security.SecurityException: The
Kerberos credential handle could not be
acquired. The AcquireCredentialsHandle call returned the following error
code....

I use Win2k professinal system under WORKGROUP mode.
I debug the program step by step, and got the value of each
variable(displayed at the end of each line use //)

 KerberosToken GetSecurityToken()
        {
            string remoteHost =
ConfigurationSettings.AppSettings["remoteHost"]; // null
            string remoteDomain =
ConfigurationSettings.AppSettings["remoteDomain"]; //null

            string remoteHostName = System.Net.Dns.GetHostName(); //
remoteHostName is "znmaster"

            if ( remoteHost != null && remoteHost.Length > 0 )
            {
                remoteHostName = (new Uri(remoteHost)).Host;
            }

            string targetPrincipalName = null;

            if ( remoteDomain == null || remoteDomain.Length == 0 )
            {
                targetPrincipalName = "host/" + remoteHostName; //
targetPrincipal Name is host/znmaster
            }
            else
            {
                targetPrincipalName = "host/" + remoteHostName + "@" +
remoteDomain;
            }

            KerberosToken securityToken = new
KerberosToken(targetPrincipalName); // error occured here

            return securityToken;
        }

Please help me. How can I run this sample! Thank you!

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