มีปัญหาเรื่องโค้ด php การแบ่งหน้าพอคลิกไปหน้าที่ 2 ข้อมูลไม่ขึ้นคะ รบกวนด้วยนะคะ

<?
$colname = "-1";
if (isset($_POST['username'])) {
  $colname = $_POST['username'];
  $sql.= " and am.username = '$_POST[username]'";
}
$objConnect = mysql_connect("localhost","root","1234") or die("Error Connect to Database");
$objDB = mysql_select_db("db_pums");
mysql_query("SET NAMES UTF8");
$strSQL = "SELECT br.book_req_id,br.book_no, br.book_no_recevied ,br.date_recevied, br.date_export,br.status_id,br.bh_no,br.bk_no, br.kk_no,mov.ORG_ABBR,ss.status_name,am.first_name ,am.last_name FROM book_req br , mbt_org_v mov , system_status ss , admin am WHERE br.status_id = ss.status_id and mov.org_code = br.kk_no and br.username = am.username and am.username = '$_POST[username]' ";
$strSQL.=$sql;
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$Num_Rows = mysql_num_rows($objQuery);

$Per_Page = 10;   // Per Page

$Page = $_GET["Page"];
if(!$_GET["Page"])
{
	$Page=1;
}

$Prev_Page = $Page-1;
$Next_Page = $Page+1;

$Page_Start = (($Per_Page*$Page)-$Per_Page);
if($Num_Rows<=$Per_Page)
{
	$Num_Pages =1;
}
else if(($Num_Rows % $Per_Page)==0)
{
	$Num_Pages =($Num_Rows/$Per_Page) ;
}
else
{
	$Num_Pages =($Num_Rows/$Per_Page)+1;
	$Num_Pages = (int)$Num_Pages;
}

$strSQL .=" order by date_recevied DESC LIMIT $Page_Start , $Per_Page";
$objQuery  = mysql_query($strSQL);
?>

<table width="930" align="center" class="altrowstable" id="alternatecolor">
<tr>
  <th width="33">ที่</th>
	 <th width="103">ผู้รับผิดชอบ</th>
	 <th width="129">เลขที่หนังสือ</th>
	 <th width="108">เลขที่หนังสือรับ</th>
	 <th width="104">วันที่รับ</th>
	 <th width="101">วันที่ส่ง</th>
	 <th width="281">สังกัด</th>
	 <th width="72">สถานะ</th>
</tr>
<?
$i = 1;
if($Page > 1){
  $i = ($Per_Page * ($Page-1)) + 1; 
}

if($Num_Rows=='0'){ 
  echo"<h2>ไม่พบข้อมูล</h2>"; 
}
else{
	 echo"<h2>ผลการค้นหาข้อมูล";?>&nbsp;<a href="projectpolis/report2.php?username=<?=$_POST['username']?>">  
  <img src="image/print.png" alt="สั่งพิมพ์" width="36" height="36" align="absbottom" /></a><?
}
while($objResult = mysql_fetch_array($objQuery)){
?>
  <tr onmouseover="this.style.backgroundColor='#ffff66';" onmouseout="this.style.backgroundColor='#d4e3e5';">
    <td align="center"><?=$i;?></td>
	<td align="center"><?=$objResult
	["first_name"];?></td>
    <td align="center"><?=$objResult
	["book_no"];?></td>
    <td align="center"><?=$objResult
	["book_no_recevied"];?></td>
    <td align="center"><?=$objResult
	["date_recevied"];?></td>
    <td align="center"><?=$objResult
	["date_export"];?></td>
    <td align="left"><?=$objResult
	["ORG_ABBR"];?></td>
	<td align="center"><?=$objResult
	["status_name"];?></td>
  </tr>
<?
		$i++;
}
?>
</table>

<p align="center">
<p align="center">ข้อมูลทั้งหมด
  <?= $Num_Rows;?> รายการ : <?=$Num_Pages;?> หน้า :
  <?
if($Prev_Page)
{
	echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$Prev_Page'><< ย้นกลับ</a> ";
}

for($i=1; $i<=$Num_Pages; $i++){
	if($i != $Page)
	{
		echo "[ <a href='$_SERVER[SCRIPT_NAME]?Page=$i'>$i</a> ]";
	}
	else
	{
		echo "<b> $i </b>";
	}
}
if($Page!=$Num_Pages)
{
	echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$Next_Page'>ถัดไป>></a> ";
}
mysql_close($objConnect);
?>  

<form id="form1" name="form1" method="post" action="free.php" target="_blank">
<table width="850" height="157" align="center">
<tr>
  <td width="149" scope="row">&nbsp;</td>
  <td width="279">&nbsp;</td>
  <td>&nbsp;</td>
</tr>
<tr>
  <td colspan="2" scope="row"><H2>ค้นหาข้อมูลเจ้าหน้าบันทึกข้อมูล</H2></td>
  <td width="406">&nbsp;</td></tr>
<tr>
  <td align="right">ชื่อเจ้าหน้าที่:</td>
  <td><select name="username" id="username">
  <?php do {  ?>
      <option value="<?php echo $row_admin['username']?>"><?php echo $row_admin['first_name'].' '.       
      $row_admin['last_name'] ?></option>
<?php } 
  while ($row_admin = mysql_fetch_assoc($admin));
  $rows = mysql_num_rows($admin);
  if($rows > 0) {
      mysql_data_seek($admin, 0);
      $row_admin = mysql_fetch_assoc($admin);
  }
?>
</select></td>
<td>&nbsp;</td>
</tr>
<tr>
  <td></td>
  <td><input type="submit" name="btnSearch" id="btnSearch" value=" ค้นหา" /></td>
  <td>&nbsp;</td></tr>
</table>
</form>