Pagination in archive.php not working

I have created a custom archive.php page by adding some extra code to the default archive.php. I want to do pagination in that page but , don’t know why, it is not working. I use wp-pagenavi plugin for pagination. It shows the page not found error when I click on the ‘2’ to navigate to the 2nd page.

following is my custom archive.php code

<?php get_header(); ?>

<div class="archive_page">
<?php
$paged =(get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array_merge($wp_query->query, array('cat'   =>'-1,-8,-9',
'posts_per_page'=>'2','paged' =>$paged));
query_posts($args);
?>
<?php if ( have_posts() ) : ?>
<header class="page-header">
<h1 class="page-title">
<?php if ( is_day() ) : ?>
<?php printf( __( 'Daily Archives: %s', 'twentyeleven' ), '<span>' . get_the_date() . '</span>' ); ?>
<?php elseif ( is_month() ) : ?>
<?php printf( __( 'Monthly Archives: %s', 'twentyeleven' ), '<span>' . get_the_date( _x( 'F Y', 'monthly archives date format', 'twentyeleven' ) ) . '</span>' ); ?>
<?php elseif ( is_year() ) : ?>
<?php printf( __( 'Yearly Archives: %s', 'twentyeleven' ), '<span>' . get_the_date( _x( 'Y', 'yearly archives date format', 'twentyeleven' ) ) . '</span>' ); ?>
<?php else : ?>
<?php _e( 'Blog Archives', 'twentyeleven' ); ?>
<?php endif; ?>
</h1>
</header>
<div id="navig">
    <?php if (function_exists('wp_pagenavi')){wp_pagenavi();}?>
</div>
<?php while ( have_posts() ) : the_post();?>
	<div id="all_posts">
	<div id="auth_ava">
	<?php echo get_avatar( get_the_author_email(), '65');?>
	</div>
	<div class="post_title_archive">
	<?php
	the_title();
	?>
	</div>
	<div id="name_date_coment_tag">
	<div id="auth_dis_name">
	<?php the_author_posts_link();?>
	</div>
	<div class="border">|</div>
	<div id="posted_date_archive">
	<?php
	the_time('F j, Y');
	?>
	</div>
	<div class="border">|</div>
	<div class="categories">
	Categories: <?php the_category(', '); ?>
	</div>
	<div class="border">|</div>
        <div id="tags_archive">
        <?php
	the_tags('Tags: ', ', ', '<br />');
	?>
	</div>
	</div>
	</div>
	<div class="excerpt_archive">
	<?php
	the_excerpt();
	?>
        </div>
	<?php endwhile; ?>
	<div id="navig">
	<?php
	if (function_exists('wp_pagenavi')){wp_pagenavi();}
         ?>
	</div>
	<?php else : ?>
        <article id="post-0" class="post no-results not-found">
	<header class="entry-header">
	<h1 class="entry-title"><?php _e( 'Nothing Found', 'twentyeleven' ); ?></h1>
	</header>
       <div class="entry-content">
      <p>
      <?php _e( 'Apologies, but no results were found for the
      requested archive. Perhaps searching will help find
        a related post.', 'twentyeleven' ); ?>
     </p>
    <?php get_search_form(); ?>
    </div>
</article>
<?php endif; ?>
</div>
<?php get_footer(); ?>