vb's pagination

[AN-net]

im trying to use vb's pagination but it isnt working
i keep getting division of by zero on line 1611 in includes/functions.php.
this is the code:

PHP Code:

    $limit=2;
    $query_count= $DB_site->query("SELECT * FROM gallery WHERE gallery_id='$id'");
    $totalrows= $DB_site->num_rows($query_count);
        if(empty($page)){
            $page=1;
        }
    sanitize_pageresults($totalrows, $page, $limit,100);
    $limitlower = ($page - 1) * $limit+1;
    $limitupper = ($page) * $limit;
    if ($limitupper > $totalrows)
    {
        $limitupper = $totalrows;
        if ($limitlower > $totalrows)
        {
            $limitlower = $totalrows-$limit;
        }
    }
    if ($limitlower <= 0)
    {
        $limitlower = 1;
    }
$fgall= $DB_site->query("SELECT gallery_index.gallery_views,gallery.* FROM gallery,gallery_index WHERE gallery_index.gallery_id='$id' AND gallery.gallery_id='$id' LIMIT " . ($limitlower-1) . ",$limit $type $order");
$imagesnum=$DB_site->num_rows($fgall);
    if($imagesnum==0){    
    $DB_site->query("UPDATE gallery_index SET gallery_views=gallery_views+1 WHERE gallery_id='$id'");
            $fgalnav=$DB_site->query("SELECT gallery_index.gallery_name FROM gallery_index WHERE gallery_index.gallery_id='$id'");
            $galnav=$DB_site->fetch_array($fgalnav);
            $navbits = array();
            $navbits["#"] = "Gallery";
            $navbits["gallery.php?view=index"] = "Gallery Index";
            $navbits[''] = $galnav[gallery_name];

            $navbits = construct_navbits($navbits);
        eval('$navbar = "' . fetch_template('navbar') . '";');
        mysql_free_result($fgalnav);
        eval('print_output("' . fetch_template('gallery_gal_none') . '");');
}
else{    
    while($gallery= $DB_site->fetch_array($fgall))
{
        if($gallery[image_totalvotes]==0){
            $rating=0;
        }
        else{
            $calcrating= $gallery[image_totalrating]/$gallery[image_totalvotes];
            $rating= round($calcrating);
        }
    $galleryimagedate=date("m/d/Y - g:i A",$gallery[image_date]);    
    if($galoption[gallerybit]==1){
        eval('$gallerybits .= "' . fetch_template('gallery_gal_lvl1alt') . '";');
    }
    else{
        eval('$gallerybits .= "' . fetch_template('gallery_gal_lvl1') . '";');
    }    
}
    mysql_free_result($fgall);
    $DB_site->query("UPDATE gallery_index SET gallery_views=gallery_views+1 WHERE gallery_id='$id'");
        $fgalnav=$DB_site->query("SELECT gallery_index.gallery_name FROM gallery_index WHERE gallery_index.gallery_id='$id'");
        $galnav=$DB_site->fetch_array($fgalnav);
        $navbits = array();
        $navbits["#"] = "Gallery";
        $navbits["gallery.php?view=index"] = "Gallery Index";
        $navbits[''] = $galnav[gallery_name];

        $navbits = construct_navbits($navbits);
    eval('$navbar = "' . fetch_template('navbar') . '";');
    $pagenav = construct_page_nav($totalrows, "gallery.php?view=gal&amp;id=$id", "&amp;pp=$limit");
    mysql_free_result($fgalnav);
            if(in_array($bbuserinfo['usergroupid'], array(4,5,6))) 
            { 
                eval('$submitgal .= "' . fetch_template('gallery_subbutton') . '";');
            }
    eval('print_output("' . fetch_template('gallery_gal') . '");'); 


can anyone help?
it show the lil page nav page with "Page of 0"