php fpdf ดึงข้อมูลจาก mysql แล้วบรรทัดตก ไม่ต่อกัน

$sql_info= "select * from meeting_info where id_meeting='".$id."'";
$res_info = mysql_query($sql_info) or die ('Error '.$sql_info);
$html ='<table border="1">
     <tr>
	<td width="400" height="30">Descriptions of meeting</td>
	<td width="100" height="30">Action by</td>
	<td width="100" height="30">Finished date</td>
    </tr>';
    $i_info=0;
    while($rs_info=mysql_fetch_array($res_info)){
        $i_info++;
	$description=iconv('UTF-8','TIS-620',$rs_info['description']);
	$html .='<tr>
		<td width="400" height="30">'.$description.'</td>
		<td width="100" height="30">'.$rs_info['action_by'].'</td>
		<td width="100" height="30">'.$rs_info['finished_date'].'</td>
		</tr>';
   }
$html .='</table>';
$sum_line=$sum_y+6;
$pdf->setXY(10,$sum_line);
$pdf->WriteHTML($html, true, 0, true, 0);