ขึ้นออเร่อ Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in C:\AppServ\www\TPFC\TPFC\index.php on line 116 หลังจากเพิ่ม order by Id_project desc รบกวนช่วยดูให้หน่อยค่ะ

<?php
include"./admin/connection.php";

$strSQL = " SELECT * FROM project ";

$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$Num_Rows = mysql_num_rows($objQuery);

$Per_Page = 3;   // 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 Id_project ASC LIMIT $Page_Start , $Per_Page ";
$objQuery  = mysql_query($strSQL);
echo"<table border=\"2\"  cellspacing=\"\" cellpadding=\"0\" bgcolor=\"#FFFFFF\" ><tr>";
        $intRows = 0;
        while($objResult = mysql_fetch_array($objQuery))
        {
            echo "<td>"; 
            $intRows++;
?>


          <p class="imgholder">
           <img src="images/<?php echo $objResult["img_project"];?>" alt="" width="286" height="100"/></p>
            <h2><font size="3"><?php echo $objResult["Name_project"];?></font></h2>
            <h2><textarea cols="38" rows="4" ><?php echo $objResult["lit_project"];?></textarea></h2>
          <p class="readmore"><a href="#">Read More &raquo;</a></p>
          
          </li>
           
        </ul>
<?php
            echo"</td>";
            if(($intRows)%4==0)
            {
                echo"</tr>";
            }
        }
        echo"</tr></table>";
    ?>
    <center><br>
        Total <?php echo $Num_Rows;?> Record : <?php echo $Num_Pages;?> Page :
        <?php
        if($Prev_Page)
        {
            echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$Prev_Page'><< Back</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'>Next>></a> ";
        }
        ?>

<?php
mysql_close($objConnect);
?>