Problem med program hvor rettigheder bliver benægtet

Min server kan godt bruge applikationen, men hverken netværk eller internet brugere kan...
her er dump af fejlen

Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'NT AUTHORITY\NETWORK SERVICE'.

Source Error:


Line 69:                      Dim sqlCommand As System.Data.SqlClient.SqlCommand = New System.Data.SqlClient.SqlCommand(queryString, sqlConnection)
Line 70:   
Line 71:              sqlConnection.Open()
Line 72:   
Line 73:                      sqlCommand.Parameters.Add("@Username", System.Data.SqlDbType.VarChar).Value = username


Stack Trace:

Stack Trace:


[SqlException: Login failed for user 'NT AUTHORITY\NETWORK SERVICE'.]
  System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) +472
  System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) +372
  System.Data.SqlClient.SqlConnection.Open() +384
  ASP.Project_aspx.existinguser(String username) in c:\inetpub\wwwroot\Project.aspx:71
  ASP.Project_aspx.BSubmit_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\Project.aspx:157
  System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108
  System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +57
  System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +18
  System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
  System.Web.UI.Page.ProcessRequestMain() +1277


Er der nogen der kan hjælpe?