Incompatibilities between get_sidebar and pagination

I just figured out how to make pagination work for my articles’ page, following the last answer in:
https://stackoverflow.com/questions/14364488/wordpress-pagination-next-posts-link-on-custom-wp-query-not-showing

So after that, my pagination was working, but my get_sidebar() stopped working.
In this sidebar I was displaying last entrances (using the widget) and the most popular posts, using WordPress Popular Posts. These two blocks are not displayed anymore and I wonder if there is anything I am doing wrong.

The code I used is the following:

<div class="XX">
    <?php
    global $wp_query, $paged, $copy_query;
    if( get_query_var('paged') ) {
        $paged = get_query_var('paged');
    }else if ( get_query_var('page') ) {
        $paged = get_query_var('page');
    }else{
        $paged = 1;
    }
    $copy_query = $wp_query;
    $wp_query = null;
    $args = array(
        'category_name' => 'XX',
        'posts_per_page' => 5,
        'paged' => $paged
    );
    $wp_query = new WP_Query();
    $wp_query->query( $args );
    while ($wp_query->have_posts()) : $wp_query->the_post();
    ?>
    <div class="XXX">
        <h2><a href="<?php the_permalink(); ?>"><?php the_title();?></a></h2>
    </div>
    <div class="YYY">
    <?php
    the_excerpt();
    n_clear();?>
    </div>
    <div class="ZZZ">
        <p><a href="<?php the_permalink(); ?>">Something</a></p>
    </div>
    <?php endwhile; ?>
	</div>
	<div class="navigation">
		<div class="nav-previous"><?php previous_posts_link(); ?></div>
		<div class="nav-next"><?php next_posts_link($printposts->max_num_pages);     ?></div>
	</div>
	<?php wp_reset_query();
	$wp_query = $copy_query;?>
    </div>
    <div class="articles-sidebar">
	<?php get_sidebar(); ?>