1064 sql error from mod in split_page_results.php ?

[bonnit]

Hi i wonder if anyone can help or at least point me in the right direction, i am getting an sql syntax error when i try to access my products types page from my admin, the complete error is :

original_query=

count_query=select count(select * from zen_product_types) as total

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'select * from zen_product_types) as total' at line 1
in:
[select count(select * from zen_product_types) as total ]
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i have recently installed a code by limelites for spilt_page_results.php found in this thread

http://www.zen-cart.com/forum/showthread.php?t=37658

installation went fine on the client side but admin side i cannot access my product types page and just see the error as listed above.

<?php
/**
 * split_page_results Class.
 *
 * @package classes
 * @copyright Copyright 2003-2006 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: split_page_results.php 3041 2006-02-15 21:56:45Z wilt $
 */
if (!defined('IS_ADMIN_FLAG')) {
  die('Illegal Access');
}
/**
 * Split Page Result Class
 * 
 * An sql paging class, that allows for sql reslt to be shown over a number of pages using  simple navigation system
 * Overhaul scheduled for subsequent release
 *
 * @package classes
 */
class splitPageResults extends base {
  var $sql_query, $number_of_rows, $current_page_number, $number_of_pages, $number_of_rows_per_page, $page_name;

  /* class constructor */
  function splitPageResults($query, $max_rows, $count_key = '*', $page_holder = 'page', $debug = true) {
    global $db;

    $this->sql_query = $query;
    $this->page_name = $page_holder;

    if ($debug) {
      echo 'original_query=' . $query . '<br /><br />';
    }
    if (isset($_GET[$page_holder])) {
      $page = $_GET[$page_holder];
    } elseif (isset($_POST[$page_holder])) {
      $page = $_POST[$page_holder];
    } else {
      $page = '';
    }

    if (empty($page) || !is_numeric($page)) $page = 1;
    $this->current_page_number = $page;

    $this->number_of_rows_per_page = $max_rows;

    $pos_to = strlen($this->sql_query);

    $query_lower = strtolower($this->sql_query);
    $pos_from = strpos($query_lower, ' from', 0);

    $pos_group_by = strpos($query_lower, ' group by', $pos_from);
    if (($pos_group_by < $pos_to) && ($pos_group_by != false)) $pos_to = $pos_group_by;

    $pos_having = strpos($query_lower, ' having', $pos_from);
    if (($pos_having < $pos_to) && ($pos_having != false)) $pos_to = $pos_having;

    $pos_order_by = strpos($query_lower, ' order by', $pos_from);
    if (($pos_order_by < $pos_to) && ($pos_order_by != false)) $pos_to = $pos_order_by;

    if (strpos($query_lower, 'distinct') || strpos($query_lower, 'group by')) {
      $count_string = 'distinct ' . zen_db_input($count_key);
    } else {
      $count_string = zen_db_input($count_key);
    }
    $count_query = "select count(" . $count_string . ") as total " .
    substr($this->sql_query, $pos_from, ($pos_to - $pos_from));
    if ($debug) {
      echo 'count_query=' . $count_query . '<br /><br />';
    }
    $count = $db->Execute($count_query);

    $this->number_of_rows = $count->fields['total'];

    $this->number_of_pages = ceil($this->number_of_rows / $this->number_of_rows_per_page);

    if ($this->current_page_number > $this->number_of_pages) {
      $this->current_page_number = $this->number_of_pages;
    }

    $offset = ($this->number_of_rows_per_page * ($this->current_page_number - 1));

    // fix offset error on some versions
    if ($offset < 0) { $offset = 0; }

    $this->sql_query .= " limit " . $offset . ", " . $this->number_of_rows_per_page;
  }

  /* class functions */

  function display_links($max_page_links,$parameters = '') {
      if ( zen_not_null($parameters) && (substr($parameters, -1) != '&') ) $parameters .= '&';
      $num_pages = ceil($this->number_of_rows / $this->number_of_rows_per_page);
      $pages_array = array();
      for ($i=1; $i<=$num_pages; $i++) {
        $pages_array[] = array('id' => $i, 'text' => $i);
      }

      if ($num_pages > 1) {
        $display_links = zen_draw_form('pages', zen_href_link($_GET['main_page']),'get') . zen_draw_hidden_field('main_page', $_GET['main_page']);

        if ($this->current_page_number > 1) {
          $display_links .= '<a href="' . zen_href_link($_GET['main_page'], $parameters . $this->page_name . '=' . ($this->current_page_number - 1), 'NONSSL') . '" class="splitPageLink">' . PREVNEXT_BUTTON_PREV . '</a>&nbsp;&nbsp;';
        } else {
          $display_links .= PREVNEXT_BUTTON_PREV . '&nbsp;&nbsp;';
        }

    $display_links .= sprintf('Page %s of &nbsp;%d', zen_draw_pull_down_menu($this->page_name, $pages_array, $this->current_page_number, 'onChange="this.form.submit();"'), $num_pages);

        if (($this->current_page_number < $num_pages) && ($num_pages != 1)) {
          $display_links .= '&nbsp;&nbsp;<a href="' . zen_href_link($_GET['main_page'], $parameters . $this->page_name . '=' . ($this->current_page_number + 1), 'NONSSL') . '" class="splitPageLink">' . PREVNEXT_BUTTON_NEXT . '</a>';
        } else {
          $display_links .= '&nbsp;&nbsp;' . PREVNEXT_BUTTON_NEXT;
        }

        if ($parameters != '') {
          if (substr($parameters, -1) == '&') $parameters = substr($parameters, 0, -1);
          $pairs = explode('&', $parameters);
          while (list(, $pair) = each($pairs)) {
            list($key,$value) = explode('=', $pair);
            $display_links .= zen_draw_hidden_field(rawurldecode($key), rawurldecode($value));
          }
        }

        if (SID) $display_links .= zen_draw_hidden_field(zen_session_name(), zen_session_id());

        $display_links .= '</form>';
      } else {
        $display_links = sprintf(TEXT_RESULT_PAGE, $num_pages, $num_pages);
      }
      return $display_links;
    }  
  // display number of total products found
  function display_count($text_output) {
    $to_num = ($this->number_of_rows_per_page * $this->current_page_number);
    if ($to_num > $this->number_of_rows) $to_num = $this->number_of_rows;

    $from_num = ($this->number_of_rows_per_page * ($this->current_page_number - 1));

    if ($to_num == 0) {
      $from_num = 0;
    } else {
      $from_num++;
    }

    if ($to_num <= 1) {
      // don't show count when 1
      return '';
    } else {
      return sprintf($text_output, $from_num, $to_num, $this->number_of_rows);
    }
  }
}
?>

any help would be VERY WELCOME :) thanks in advance