The ConnectionString property has not been initialized.

När jag ska öppna databasen så får jag följande fel, men AppSettings fungerar på websidan när jag hämtar ut data i ed GridView...


Line 36: SqlConnection sqlConnection1= new SqlConnection(ConfigurationSettings.AppSettings["ConnectionStringHallar"]);
Line 37: SqlCommand cmd_Email = new SqlCommand("SELECT Email FROM [KlubbarNya1] WHERE (([Sortering] = N'Test') AND ([Skicka] =N'True'))", sqlConnection1);
Line 38: sqlConnection1.Open();
Line 39: SqlDataReader read_Email = cmd_Email.ExecuteReader();

Ha en bra dag
Gert