Wordpress rewrite url with query parameters -

i have post categories based 1 year, month , date

categories

2013     may 14     april 10 2012     june 6 

i creating rewrite urls particular date categories
creating url category/slug-name/issues/year/month/date

my rewrite url below

add_action('generate_rewrite_rules', 'past_issue_rewrite_rules'); function past_issue_rewrite_rules( $wp_rewrite ) {     $wp_rewrite->rules = array_merge( array('category/past-issues/issues/(.+)/(.+)/     (.+)/' => 'category/past-issues/?year='.$wp_rewrite->preg_index(1).'&month='.     $wp_rewrite->preg_index(2).'&day='.$wp_rewrite->preg_index(3)),      $wp_rewrite->rules ); }  add_filter( 'query_vars', 'setup_filter_query_vars' );    function setup_filter_query_vars( $query_vars ) {     $query_vars[] = 'year';     $query_vars[] = 'month';     $query_vars[] = 'day';     return $query_vars; } 

when tried access page showing page not found. error? possible send parameters category.php page

i not sure. please let me know if wrong.

i found s0lution myself , here code

 function past_issue_rewrite_rules(){      add_rewrite_rule(         'category/past-issues/(\d+)/(\d+)/(\d+)/?$',         'index.php?category_name=past-issues&pyear=$matches[1]&pmonth=$matches[2]&pday=$matches[3]',         'top'     ); } add_action( 'init', 'past_issue_rewrite_rules' ); add_filter( 'query_vars', 'setup_filter_query_vars' ); function setup_filter_query_vars( $query_vars ) {     $query_vars[] = 'pyear';     $query_vars[] = 'pmonth';     $query_vars[] = 'pday';     return $query_vars; }