PHP - Item list with page links at the bottom (50 items per page, 14 pages), links don't move to next page

I have a listing of products, which is pulled from a database.  In order to make the lists more manageable, they are separated into groups of 50 per page, with links to the follow pages auto-generated on the bottom of the page.  The links show up correctly and when clicked, show the correct URL in the address bar, but it always shows the same list of items 1-50, as opposed to moving to 51-101, 102-152, etc.

The code was working correctly on another server, but I am moving the site to a new hosting platform and will not work correctly on the new server.  Code is listed below:

  <tr>
    <td height="27" class="link2">View Products</td>
  </tr>
  <tr>
    <td height="300" align="center" valign="top"><div align="left" class="heading1"><br>
      </div>
      <table width="95%" border="0" cellspacing="0">
        <tr  class="heading1">
          <td width="5%" rowspan="2" align="center">Sl.No</td>
          <td width="11%" rowspan="2">&nbsp;</td>
          <td width="24%" rowspan="2">Product Name</td>
          <td width="24%" rowspan="2" align="center">Category Name</td>
          <td width="14%" rowspan="2" align="center">Display Status</td>
          <td colspan="4"> <div align="center">Action</div></td>
        </tr>
        <tr align="center" class="heading1">
          <td width="9%">Edit</td>
          <td width="9%">Delete</td>
          <td width="9%">View</td>
          <td width="13%">Display Status</td>
        </tr>
        <?
                                                      
                                                      $dbconn = mysql_connect($hostname, $db_login, $db_pass) or die("Could not connect");   // connects to host
                                                      mysql_select_db($database) or die("Could not select database");    // selecting databes
                                                      $string1 = "SELECT e*,c.category_name FROM en_product_master e,en_product_main_category c where e.product_sub_cat_id=c.main_cat_id order by product_id desc";
                                                      $string1 = "SELECT e.*  FROM en_product_master e";
                                                      //echo $string1;
                                                      $result1 = mysql_query($string1) or die('<br>Error Try Again<br>' . mysql_error());
                                                      //$result1=getSqlRS($string1);
                                                      
                                                      $recnum=isset($recnum)? $recnum:0;
                                                      $proddetails=mysql_fetch_array($result1);
                                                      
                                                      $row= mysql_num_rows($result1);
                                                      if ($row=="0")
                                                      {
                                                      echo "<tr><td colspan='6' class=heading1 align=center>No Products Existed</td></tr>";
                                                      }
                                                      for($h=0;$h<preBar1($recnum)*50;$h++)
                                                            $proddetails=mysql_fetch_array($result1);
                                                      
                                                      $cnt=1;
                                                      for($fg=1,$cu=0;$h<$row && $cu<50;$h++,$cu++,$fg++)
                                                      {
                                                            $proddetails=mysql_fetch_array($result1);
                                                            $i=$h;
                                                      if (mysql_result($result1,$i,'product_status')=="active")
                                                      {
                                                            $str= "<a href='adm_tasks1.php?work=productinactive&id=".mysql_result($result1,$i,'product_id')."' title='Click here to inactivate'><img src='images/No.gif'  height='15' border='0'></a>";
                                                      }
                                                      else
                                                      {
                                                            $str= "<a href='adm_tasks1.php?work=productactive&id=".mysql_result($result1,$i,'product_id')."' title='Click here to Activate'><img src='images/Yes.gif'  border='0'></a>";
                                                      }
                                                      
                                                      ?>
        <tr valign="middle" class="bodytext">
          <td height="43" align="center">
            <?  echo $cnt; ?>
          </td>
          <td align="center">
            <? if (mysql_result($result1,$i,'image_name1')!=""){?>
            <img src="upload/<? echo mysql_result($result1,$i,'image_name1'); ?>" width="75" height="75">
            <?}?>
          </td>
          <td><? echo substr(mysql_result($result1,$i,'product_name'),0,30); ?>
            <br> </td>
          <td align="center">
            <?
              $string2 = "SELECT * FROM en_product_main_category   where main_cat_id='".mysql_result($result1,$i,'product_sub_cat_id')."'";
             // echo $string2;
              $result2 = mysql_query($string2) or die('<br>Error Try Again<br>' . mysql_error());
              $ns=mysql_num_rows($result2);
              if($ns>0){
                    $proddetails=mysql_fetch_array($result2);                                    
                    $i1=$proddetails[1];
                  }
             
             
              echo $i1;
             
            
               ?>
          </td>
          <td align="center"><? echo mysql_result($result1,$i,'product_status'); ?></td>
          <td align="center"><a href="edit_product.php?id=<? echo mysql_result($result1,$i,'product_id'); ?>&recnum=<? echo $recnum;?>"><img src="images/edit_record.gif" width="20" height="20" border="0"></a></td>
          <td align="center"><a href="javascript:dele_confirm('<? echo  mysql_result($result1,$i,'product_id');?>','product_delete')"><img src="images/icon_delete.gif" alt="Click Here to Delete" width="15" height="16" border="0"></a></td>
          <td align="center"><a href="../product_detailed.php?p_id=<? echo mysql_result($result1,$i,'product_id'); ?>" target="_blank"><img src="images/tocdoc.gif" width="24" height="22" border="0"></a></td>
          <td align="center"><? echo $str;?></td>
        </tr>
        <?
            $cnt = $cnt + 1;
            $i=$i+1;
            }                  
            ?>
        <tr>
          <td colspan="9">
            <? createNavBar1 ($row,preBar1($recnum),50,'work='. $work); ?>
          </td>
        </tr>Start Free Trial