hmobron on "paginate_links problem"

Hello there,

I made my own search form that's working well, but a can't the paginate_links working. Every page contains the same results as page 1.
How can help me in the right direction?

$mypostids = $wpdb->get_col("select ID from $wpdb->posts where post_title LIKE '".$_REQUEST["start_letter"]."%' AND post_type='product' ");
  //  print_r($mypostids);

    $argssearch = array('post__in'=> $mypostids,
                        'post_type'=>'product',
                        'orderby'=>'title',
                        'order'=>'asc',
                        'posts_per_page'=>10,
                        'product_tag'=>urldecode( $_REQUEST["product_tag"]),
                        'product_cat'=>urldecode( $_REQUEST["product_cat"]),
                        'paged=' => $paged);

    $querysearch = new WP_Query($argssearch);
    echo "<br/>-".$querysearch->post_count."-".$paged."<br/>" ;
$big = 999999999; // need an unlikely integer

echo paginate_links( array(
	'base' => str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) ),
	'format' => '?paged=%#%',
  	'current' => max( 1, get_query_var('paged') ),
	'total' => $querysearch->max_num_pages,
    'add_args' => array('start_letter'=>$_REQUEST["start_letter"],
                        'product_tag'=>urlencode ($_REQUEST["product_tag"]),
                        'product_cat'=>urlencode ($_REQUEST["product_cat"]),
                        'ZOEK' => 'Zoek'
) ));