PAGINATION: &sf_paged=%#% doesn't add to URL

Hi everybody,

I’ve set the code here below to have pagination in a custom search result page (search-games.php).
I can see the pagination links but all pointing to the first page. Looking at the URL I’ve seen that the “&sf_paged=%#%” it’s not added.

Is there a way to solve the problem?

Thanks for your help.
Ronny

— PAGINATION CODE —
global $wp_query;
$total = $wp_query->max_num_pages;
if ( $total > 1 ) {
// get the current page
if ( !$current_page = get_query_var(‘paged’) )
$current_page = 1;
// structure of “format” depends on whether we’re using pretty permalinks
if( get_option(‘permalink_structure’) ) {
$format = ‘&sf_paged=%#%’;
} else {
$format = ‘page/%#%/’;
}
echo paginate_links(array(
‘base’ => get_pagenum_link(1) . ‘%_%’,
‘format’ => $format,
‘current’ => $current_page,
‘total’ => $total,
‘mid_size’ => 4,
‘type’ => ‘list’,
‘prev_text’ => __(‘«’),
‘next_text’ => __(‘»’),
));
}