WordPress WP Pagenavi errors

<?php
/**
 * Template index
 * @package WordPress
 * @subpackage wpmidia lab
 * @author Miriam de Paula - http://wpmidia.com.br
 * @since 09/03/2012 - v1
 */
get_header();
global $wp_query;
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

$args = array_merge( $wp_query->query, array('post_type' => array('post','lab'), 'paged' => $paged ) );
query_posts($args);
?>

<!-- My normal loop goes here ..... -->

<?php wp_pagenavi(array( 'query' => $wp_query )); wp_reset_query(); >