ช่วยด้วยคับทำโปรเจคมีปัญหา ยังทำตาราง Report ไม่ได้คับผม

<?
$sql = mysql_query("SELECT * FROM `list_stu`,`students`,`subject` WHERE students.id_stu=list_stu.id_stu and list_stu.id_sub=subject.id_sub and  list_stu.id_sub='665312'");
$i = 0;
$arr2;
echo "<table border=\"1\"><tr><td>Names</td><td>2011-08-09</td><td>2</td><td>3</td><td>4</td></tr>";
while($rs = mysql_fetch_array($sql))
{
	$arr[$i] = $rs['id_stu']." ".$rs['fname']." ".$rs['lname'];
	$arr2[$i] = $rs['id_stu'];
	echo $arr[$i];
	echo $arr2[$i]."<br>";
	$sql2 = mysql_query("SELECT * FROM `students`,`check`,`detail_check` WHERE students.id_stu=detail_check.id_student  and check.id_check=detail_check.id_check and check.course_code='665312' and check.date='2011-08-10' and detail_check.id_student='$arr2[$i]'");

	$rs2 = mysql_fetch_array($sql2);
	$arr3[$i] = $rs2['id_check'];

	if($arr3[$i])
	{
		echo "<tr><td>".$arr[$i]."</td><td>Study</td></tr>";
		
		
	}
	else
	{
		echo "<tr><td>".$arr[$i]."</td><td>Miss</td></tr>";
	}
	$i++;

}
echo "</table>";
?>