Custom Post Type and single-posttype template
I found solution. Big Thanks @Scribu Alternative to query_posts for main loop? Now works fine and no more 404 error. function wpse49295_alter_the_query( $request ) { $dummy_query = new WP_Query(); $dummy_query->parse_query( $request ); if ( $dummy_query->is_single() ) $request[‘post_type’] = ‘topic’; return $request; } add_filter( ‘request’, ‘wpse49295_alter_the_query’ );