WordPress pagination going on Page not Found

i m applying pagination on archive.php, but the pagination links not working and going on 404.php. my code is below, i did also changed permalink setting, also did set to default but failed. it display pagination but links are broken. please guide me if anyone can. thanks alot.

$paged = (get_query_var(‘paged’)) ? get_query_var(‘paged’) : 1;
$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query(‘showposts=1&cat=44′.’&paged=’.$paged);
while ( $wp_query->have_posts() ) : $wp_query->the_post();
the_title();
endwhile;
if(function_exists(‘wp_pagenavi’)) {
wp_pagenavi();
}