System.IndexOutOfRangeException

public static Customer GetCustomer(int idCallActionItem)
        {
            Customer result = new Customer();

            SqlCommand cmd = new SqlCommand("GetCustomer");
            cmd.CommandType = CommandType.StoredProcedure;

            SqlParameter param1 = new SqlParameter("@idCallActionItem", SqlDbType.Int);
            param1.Value = idCallActionItem;

            cmd.Parameters.Add(param1);


            SqlDataReader reader = Database.ReturnExecuteReader(cmd);

            if (reader.Read())
            {






                result.IdCustomer = Convert.ToInt32(reader["IdCustomer"].ToString());
                result.Surname = reader["Surname"].ToString();
                result.Name = reader["Name"].ToString();
                result.Street = reader["Street"].ToString();
                //result.Nasl = reader["Naslov1"].ToString();     //error

Additional information: Naslov1



Naslov1 is same table as Street. I dont know why i get error if someone can explain to me why i get error



and how can i fix it. Thx for your answers.