ช่วยดู code อันนี้ให้ผมทีครับว่าผิดตรงไหนเนื่องจากกดลบแล้วไม่สามารถลบได้

<?
include("../../../include/connect1.php");  
$id_photo=$_GET['id_photo'];
$id_act=$_GET['id_act'];
$sql="select * from nt_photo where id_photo='$id_photo' ";
$result=mysql_query($sql);
//$result=mysql_db_query($dbname,$sql) or die(mysql_error() . '<br/>' . $sql);
while ($r=mysql_fetch_array($result) )  {
			$name_photo=$r[name_photo];
if (file_exists("myphoto/$name_photo")) {
		unlink("myphoto/$name_photo");
	}
}
$sql="delete from nt_photo where id_photo='$id_photo' ";
mysql_query($sql);

		echo "<br><img src='../../images/publish_x.png' width='16' height='16' /> ลบข้อมูลเรียบร้อย";
		echo"<meta http-equiv='refresh' content='0;URL=photo_act.php?id_act=$id_act'>";   

mysql_close(); 
?>