The Connection Gets Closed Right After It Opens.

I have the Function, that fires from onLoad even of one of the asp:Label controls on my main page.

Here is it's code:

 SqlConnection conn = new SqlConnection();
       
        conn.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["UkraineConnectionString"].ToString();
       
        SqlCommand comm = new SqlCommand("SELECT [Greeting] FROM [Misc]", conn);

        try
        {
            conn.Open();
        }
        catch
        {
            Response.Write("Error opening connection in Page_Load of default.aspx to retrieve the greetings");
        }

        string MyGreet = (string)comm.ExecuteScalar();

        Greetings.Text = MyGreet;

        try
        {
            conn.Close();
        }
        catch
        {
            Response.Write("Error closing connection in Page_Load of default.aspx after retrieving the greetings");
        }   
    }


When it gests to conn.Open() in the debugging mode I see that the ServerVersion = 'conn.ServerVersion' threw an exception of type 'System.InvalidOperationException'.

The most interesting thing is that it used to work before.

Here is the connection string it retrieves fine.

"Data Source=MDM1;AttachDbFilename=|DataDirectory|Ukraine.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"

 As I said it used to work, but one day I tried to access the web site and it said this error that I get, that the connection is closed. Then I was using the SQL Server Express. When in the Visual studio if I would run this same site in debug, everything was working fine. I decided to uninstall the SQL Express and installed the SQL Server.

If I open the SQL Server Managment Studio in the Server name field I see MDM1(this is the name of the PC, but probably it is the same name for the Server. Well, in the MAnagment Studio it conects fine to the MDM1 so it is no probably the naming problem. Ithink it has something to do with permisssions.

If someon can - please help. Thanks.