problem with pages

[Mr_Lka3h]

hello , i have problem with msgs script ,,

the problem is when i want go to the next page ,, i chose the next page but i still in same page ,,

http://www.4bbm.net/msgs/index.php?cat=msgs&catid=2

that is my problem you can now go to the last in this link then chose any page and you understand what i mean ,,

this code from pager.php

<?
$cat=$_GET['cat'];
$PHP_SELF=$_SERVER[PHP_SELF];
class Pager
{
    var $start;
    var $page;
    var $numrows;
    var $perpage;
    var $pagelink;
    var $catid;
    var $cat;

function Pager($_start,$_page, $_pagelink='')
{

    $this->start     =  $_start;

    $this->page      =  $_page;

    $this->pagelink  =  $_pagelink;
}

function SetPagerN($_perpage,$_numrows)
{

    $this->perpage = $_perpage;

    $this->numrows = $_numrows;
}

function PageNum()
{
     global $catid,$cat,$htmllink,$PHP_SELF,$cid,$pag,$CATN,$page;
    if((isset($this->pagelink))&&($this->pagelink!=''))
    {
        $this->pagelink = $this->pagelink."&";
    }

    if ($this->numrows>$this->perpage)
    {
        $pagenum = "<p align=center>&#1575;&#1604;&#1589;&#1601;&#1581;&#1575;&#1578; : ";

        if($this->page > 2)
        {
           if($htmllink==on){

            $pagenum .= " ... <a title=\"$CATN\" href=showmsgs-$catid-0-1.html>[1]</a> ... \n";
            } else {
            $pagenum .=  "<a title=\"$CATN\" href=$PHP_SELF?".$this->pagelink."catid=$catid&cat=$cat&start=0&page=1>[1]</a> ... \n";
            }
        }

        $this->pages = ceil($this->numrows/$this->perpage);

        if($this->page == 0)
        {
            $this->page = 1;
        }

        if($this->page > 0)
        {
            $this->page = $this->page - 1;
        }

        $this->maxpage =  $this->page + 3 ;

        for ($i = $this->page ; $i <= $this->maxpage && $i <= $this->pages ; $i++)
        {
            if($i > 0)
            {
                $this->nextpag = $this->perpage*($i-1);

                if ($this->nextpag == $this->start)
                {
                     $pagenum .= "<font size=2 face=tahoma><b>$i</b></font>&nbsp;\n";
                }
                else
                {

                      if($htmllink==on){
                      $pagenum .= "<a title=\"$CATN &#1575;&#1604;&#1589;&#1601;&#1581;&#1577; $i\" href=showmsgs-$catid-$this->nextpag-$i.html>[$i]</a>&nbsp;\n";
                      }else {
                      $pagenum .= "<a title=\"$CATN &#1575;&#1604;&#1589;&#1601;&#1581;&#1577; $i \" href=$PHP_SELF?".$this->pagelink."catid=$catid&cat=$cat&start=$this->nextpag&page=$i>[$i]</a>&nbsp;\n";
                      }
                }
            }
        }

        if (! ( ($this->start/$this->perpage) == ($this->pages - 1) ) && ($this->pages != 1) )
        {
            $this->nextpag = ($this->pages*$this->perpage)-$this->perpage;
            if($htmllink==on){
            $pagenum .= " ... <a title=\"$CATN &#1575;&#1604;&#1589;&#1601;&#1581;&#1577; $this->pages \" href=showmsgs-$catid-$this->nextpag-$this->pages.html>[$this->pages]</a>\n";
            } else {
            $pagenum .= " ... <a title=\"$CATN &#1575;&#1604;&#1589;&#1601;&#1581;&#1577; $this->pages \" href=$PHP_SELF?".$this->pagelink."catid=$catid&cat=$cat&start=$this->nextpag&page=$this->pages>[$this->pages]</a>\n";
            }
        }

         $pagenum .= "</p>";

    }
    return $pagenum;
}
}
?>

thank you so much

[Weedpacket]

You never use $_GET['catid']