DropDownList_SelectedIndexChanged() doesn't work

Hi,

I have this code, and I connected the SelectedIndexChanged event to the DropDownList but on selecting an item it doesn't do anything:

 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            String Ime = DropDownList1.SelectedItem.Value.Trim();

            SqlCommand inSqlCommand =
                    new SqlCommand("listIncidents", conn);
            inSqlCommand.CommandType = CommandType.StoredProcedure;
            SqlParameter inParameter = new SqlParameter
                ("@Iname", SqlDbType.NVarChar, 60);
            inParameter.Direction = ParameterDirection.Input;
            inParameter.Value = Ime;
            inSqlCommand.Parameters.Add(inParameter);

            SqlDataReader inSqlDataReader;
            try
            {
                conn.Open();
                inSqlDataReader = inSqlCommand.ExecuteReader();

                while (inSqlDataReader.Read())
                {
                    txtName.Text = inSqlDataReader[0].ToString();
                    txtLattitude.Text = Convert.ToString(inSqlDataReader[2]);
                    txtLongitude.Text = Convert.ToString(inSqlDataReader[1]);
                }
                inSqlDataReader.Close();
            }
            catch (SqlException exc)
            {
                Response.Write(exc.ToString());
            }
            catch (Exception ex)
            {
                Response.Write(ex.ToString());
            }
            finally
            {
                conn.Close();
            }
        }

Can anybody help me what might be wrong?

Thanks