error ครับช่วยเช็คให้หน่อยครับว่า เกิดมากจากอะไร เพราะว่าเวลา logon แล้วบอกว่ากรอบข้อมุลไม่ครบ ช่วย

<?
$db_name="project";
mysql_connect("localhost","root","1234");
mysql_select_db($db_name) or die("Could not Connect");

//$uname='admin';
//$pwd='admin';

//$uname='staff';
//$pwd='staff';

//$uname=46066318;
//$pwd=46066318;

//$uname='spk';
//$pwd='spk';

// session start
if ($uname<>"" and $pwd<> "")
{
	$sql_cmd="select * from account where username='$uname' and password ='$pwd'";
	//echo $sql_cmd;
	$result = mysql_db_query($db_name, $sql_cmd);
	$num_rows = mysql_num_rows($result);
	if($num_rows>0)
	{
		$rs = mysql_fetch_array($result);
		$level=$rs[Privilege];
		$Account_id=$rs[Account_id];
		//echo $rs[ACCOUNT_ID] . "  " . $rs[PRIVILEGE];
		echo "<center>Please wait ...</center>";
		if($level==1)
		{
			//$webpage="../admin/main_admin.php";
			//header("Location : http://localhost/root/admin/main_admin.php");
			echo "<meta http-equiv = refresh ; content = '3 ; url=../admin/main_admin.php'>:";
		}
		if($level==2)
		{
			//$webpage="../officer/main_user.php";
			echo "<meta http-equiv = refresh ; content = '3 ; url=../officer/main_user.php'>:";
		}
		if($level==3)
		{
			$sql_cmd="select stud_id from student where account_id=$account_id";
			//echo $sql_cmd;
			$result = mysql_db_query($db_name, $sql_cmd);
			$num_rows = mysql_num_rows($result);
			$rs = mysql_fetch_array($result);
			echo "<meta http-equiv = refresh ; content = '3 ; url=../stud/main_student.php?stud_id=$rs[stud_id]'>:";

			//have sesion
		}
		if($level==4)
		{
			$sql_cmd="select prof_id from professor where account_id=$account_id";
			//echo $sql_cmd;
			$result = mysql_db_query($db_name, $sql_cmd);
			$num_rows = mysql_num_rows($result);
			$rs = mysql_fetch_array($result);
			echo "<meta http-equiv = refresh ; content = '3 ; url=../prof/main_professor.php?prof_id=$rs[prof_id]'>:";

			//have sesion
		}
	}	
	else
	{
		echo "<center>¡ÃÍ¡ username ËÃ×Í password äÁè¶Ù¡µéͧ";
		echo "<br><a href =\"../login.html\">back</a></center>";
	}	
}
else
{
echo "<center>¡ÃÍ¡¢éÍÁÙÅäÁè¤Ãº";
echo "<br><a href =\"../login.html\">back</a></center>";
}
?>