ช่วยดู Code ให้หน่อยค่ะ ว่าทำไมถึงบันทึก Edit ไม่ได้ค่ะ

<?php
$sql="update tb_order set // ลองใส่ $tb_order  ไม่แน่ใจว่าลืม $ หรือเปล่าครับ 
branch_order='$branch_order',
name_order='$name_order',
memo_name_order='$memo_name_order',
sent_by_order='$sent_by_order',
recipients_order='$recipients_order',
memo_recipients_order='$memo_recipients_order',
report_order='$report_order',
status_order='$status_order' 
where id_order='$id_edit' ";

// ตรงนี้ผมก็ไม่แน่ใจนะวาผิดไหม มันแปลกๆ
$result=mysql_db_query($dbname,$sql); 
// น่าจะเป็น  $sql_query=mysql_db_query($dbname,$sql);  หรือเปล่านะครับ
$result = mysql_query($sql_query) ;

?>

<?php
ob_start();

$id_edit=$_GET['id_edit'];

$branch_order=$_POST['branch_order'];
$name_order=$_POST['name_order'];
$memo_name_order=$_POST['memo_name_order'];
$sent_by_order=$_POST['sent_by_order'];
$recipients_order=$_POST['recipients_order'];
$memo_recipients_order=$_POST['memo_recipients_order'];
$report_order=$_POST['report_order'];
$status_order=$_POST['status_order'];

include "connect.php";

$sql="update tb_order set branch_order='$branch_order',name_order='$name_order',memo_name_order='$memo_name_order',sent_by_order='$sent_by_order',recipients_order='$recipients_order',memo_recipients_order='$memo_recipients_order',report_order='$report_order',status_order='$status_order' where id_order='$id_edit' ";

mysql_db_query($dbname,$sql);

header("Location:report_order_status.php");

mysql_close();
?>