Custome Rewrite not working

I need to create rewrite rule to get all category and sub category of product on one page like

localhost/wordpress/custom-page/static-cat/sub-category

iam using following code
`function add_rewrite_rules($aRules) {
//add_rewrite_rule(‘residential/([^/]+)/?’, ‘index.php?pagename=residential&sub_category=$matches[1]’, ‘top’);

$aNewRules = array(‘custom-page/static-cat/([^/]+)/?$’ => ‘index.php? pagename=custom-page&sub_category=$matches[1]’);
$aRules = $aNewRules + $aRules;
return $aRules;
}
function add_query_vars($query_vars) {
$query_vars[] = ‘sub_category’;
return $query_vars;
}
add_action(‘rewrite_rules_array’, ‘add_rewrite_rules’);
add_filter(‘add_query_vars’, ‘add_query_vars’);

NOTE: iam getting filter listed in wp_rewrite->rewrite_rules function
by they are not affecting even i tried a simple one with any param still not working as shown
$aNewRules = array(‘shopss/?$’ => ‘index.php?pagename=custom-page’);
can anyone point out what’s wrong in this