ช่วยดูโค๊ด ให้หน่อยครับ แอดไม่ลง ฐานข้อมูลสักทีครับ ไม่ขึ้น error เลย

<form id="form1" name="form1" method="post" action="admin_page_save_add_teacher.php">

  <table width="800" border="0" cellspacing="0" cellpadding="0">
    <tr>
      <td>ชื่ออาจารย์นิเทศ</td>
      <td><label>
        <input type="text" name="name_teacher" id="name_teacher" />
      </label></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>ห้องพักอาจารย์</td>
      <td><label>
        <input type="text" name="room_teacher" id="room_teacher" />
      </label></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>เบอร์โทรศัพท์ภายใน</td>
      <td><label>
        <input type="text" name="tele_teacher" id="tele_teacher" />
      </label></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>ต่อ</td>
      <td><label>
        <input type="text" name="add_tele" id="add_tele" />
      </label></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td>อีเมล</td>
      <td><label>
        <input type="text" name="email_teacher" id="email_teacher" />
      </label></td>
      <td>&nbsp;</td>
    </tr>
    <tr>
      <td><label>
        <input type="submit" name="button" id="button" value="Submit" />
      </label></td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
  </table>
</form>

<? include "include/config.php";?>
<?

	if(trim($_POST["name_teacher"]) == "")
	{
		echo "<script> alert('กรุณากรอกชื่ออาจารย์ !!')</script>";
		print "<meta http-equiv=refresh content=0;URL=register.php>";
		exit();	
	}
	
	if(trim($_POST["room_teacher"]) == "")
	{
		echo "<script> alert('กรุณากรอกห้องพัก!')</script>";
		print "<meta http-equiv=refresh content=0;URL=register.php>";
		exit();	
	}	
	
	if(trim($_POST["tele_teacher"]) == "")
	{
		
		echo "<script> alert('กรุณากรอกเบอร์โทรศัพท์!')</script>";
		print "<meta http-equiv=refresh content=0;URL=register.php>";
		exit();	
	}	
		if(trim($_POST["add_tele"]) == "")
	{
	
		echo "<script> alert('กรุณากรอกช่องต่อ')</script>";
		print "<meta http-equiv=refresh content=0;URL=register.php>";
		exit();	
	}	
	if(trim($_POST["email_teacher"]) == "")
	{
	
		echo "<script> alert('กรุณากรอกอีเมล!')</script>";
		print "<meta http-equiv=refresh content=0;URL=register.php>";
		exit();	
	}

	else
	{	

		$strSQL = "INSERT INTO teacher (name_teacher,room_teacher,tele_teacher,add_tele,email_teacher) 
		VALUES ('".$_POST["name_teacher"]."', '".$_POST["room_teacher"]."','".$_POST["tele_teacher"]."',
		'".$_POST["add_tele"]."','".$_POST["email_teacher"]."')"
		or die (mysql_error($strSQL));

		
		$objQuery = mysql_query($strSQL);
		

		echo "<script> alert('เพิ่มอาจารย์นิเทศแล้ว ')</script>";
		echo  "<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><center><img src='icon/ajax-loader.gif' width='50' height='50' /></center>";
		print "<meta http-equiv=refresh content=0;URL=admin_page_add_teacher.php>";
	
}
	mysql_close();
?>

-- 
-- โครงสร้างตาราง `teacher`
-- 

CREATE TABLE `teacher` (
  `id_teacher` int(5) NOT NULL auto_increment,
  `name_teacher` varchar(100) NOT NULL,
  `room_teacher` varchar(20) NOT NULL,
  `tele_teacher` varchar(10) NOT NULL,
  `add _tele` varchar(10) NOT NULL,
  `email_teacher` varchar(40) NOT NULL,
  PRIMARY KEY  (`id_teacher`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;