[DotNetDevelopment] Active Directory Issue( COMException (0x8007202A): The authentication mechanism is unknown.)

[Yogesh Dige]

Hi all

i devloped  asp.net application to get the users  from different
domain in active directory. i am using LDAP to get it with windows
authentication. if i run this application throught the code on server
it is running fine and giving the users from differnt domains But, if
i host the same on the same server it is not working .i am getting the
following exception

"COMException (0x8007202A): The authentication mechanism is unknown."
i am new to work with AD so any help will be appreciate
please help me coz i stuck with this from so long.

if you want the code for ref.

  entry = new DirectoryEntry("LDAP://....", "UserName",
"******");
            DirectorySearcher dSearch = new DirectorySearcher
(entry);
            dSearch.Filter = "(&(SAMAccountName=*"+txtName.Text+"*)
(objectCategory=Person))";
            try
            {
                foreach (SearchResult sResultSet in dSearch.FindAll
())    //******Getting Error at this point ********
                {
                    string strLoginName = GetProperty(sResultSet,
"cn").ToString();
                    if (strLoginName != "" &&
                        !strLoginName.Contains("SUPPORT") &&
                        !strLoginName.Contains("krbtgt") &&
                        !strLoginName.Contains("EXCHENGERSERVER") &&
                        !strLoginName.ToLower().Contains
("systemmailbox"))