How can I make a custom post type sticky?

I installed the “Sticky Custom Post Types” plugin, and I added this code to my function.php:

function wpb_cpt_sticky_at_top( $posts ) {

    // apply it on the archives only
    if ( is_main_query() && is_post_type_archive() ) {
        global $wp_query;

        $sticky_posts = get_option( 'sticky_posts' );
        $num_posts = count( $posts );
        $sticky_offset = 0;

        // Find the sticky posts
        for ($i = 0; $i < $num_posts; $i++) {

            // Put sticky posts at the top of the posts array
            if ( in_array( $posts[$i]->ID, $sticky_posts ) ) {
                $sticky_post = $posts[$i];

                // Remove sticky from current position
                array_splice( $posts, $i, 1 );

                // Move to front, after other stickies
                array_splice( $posts, $sticky_offset, 0, array($sticky_post) );
                $sticky_offset++;

                // Remove post from sticky posts array
                $offset = array_search($sticky_post->ID, $sticky_posts);
                unset( $sticky_posts[$offset] );
            }
        }

        // Look for more sticky posts if needed
        if ( !empty( $sticky_posts) ) {

            $stickies = get_posts( array(
                'post__in' => $sticky_posts,
                'post_type' => $wp_query->query_vars['post_type'],
                'post_status' => 'publish',
                'nopaging' => true
            ) );

            foreach ( $stickies as $sticky_post ) {
                array_splice( $posts, $sticky_offset, 0, array( $sticky_post ) );
                $sticky_offset++;
            }
        }

    }

    return $posts;
}

add_filter( 'the_posts', 'wpb_cpt_sticky_at_top' );

// Add sticky class in article title to style sticky posts differently

function cpt_sticky_class($classes) {
            if ( is_sticky() ) : 
            $classes[] = 'sticky';
            return $classes;
        endif; 
        return $classes;
                }
    add_filter('post_class', 'cpt_sticky_class');

In the dashboard everything worked, but in my homepage nothing happened. This is my code that displayed the content of my homepage:

<div id="content">
<?php include (TEMPLATEPATH . '/lib/slider.php'); ?>    

<?php
$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('post_type=listings'.'&paged='.$paged);
?>
<?php while ($wp_query->have_posts()) : $wp_query->the_post(); ?>   

<div class="post propbox <?php if (++$counter % 2 == 0) { echo "lastbox"; }?> clearfix" id="post-<?php the_ID(); ?>">
<div class="archimg">

<?php  if( has_term( 'featured', 'type', $post->ID ) ) { ?>
<span class="featspan">Featured</span>
<?php } else if ( has_term( 'sold', 'type', $post->ID ) ){ ?>
<span class="soldspan">Sold</span>
<?php } else if ( has_term( 'reduced', 'type', $post->ID ) ){ ?>
<span class="redspan">Reduced</span>
<?php } ?>

<?php
    if ( has_post_thumbnail() ) { ?>
    <a href="<?php the_permalink() ?>"><img class="propimg" src="<?php bloginfo('stylesheet_directory'); ?>/timthumb.php?src=<?php get_image_url(); ?>&amp;h=180&amp;w=310&amp;zc=1" alt=""/></a>
        <?php } else { ?>
    <a href="<?php the_permalink() ?>"><img class="propimg" src="<?php bloginfo('template_directory'); ?>/images/dummy.jpg" alt="" /></a>
<?php } ?>
</div>
<div class="cover">
    <div class="title">
        <h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h2>
    </div>
    <div class="propmeta">
    <div class="proplist"><span>Price</span> <span class="propval"> <?php $price=get_post_meta($post->ID, 'wtf_price', true); echo $price; ?></span></div>
    <div class="proplist"><span>Location</span> <span class="propval"> <?php echo get_the_term_list( $post->ID, 'location', '', ' ', '' ); ?></span></div>
    <div class="proplist"><span>Property type</span> <span class="propval"><?php echo get_the_term_list( $post->ID, 'property', '', ' ', '' ); ?></span></div>
    <div class="proplist"><span>Area</span> <span class="propval"> <?php echo get_the_term_list( $post->ID, 'area', '', ' ', '' ); ?></span></div>
    </div>
    <div class="entry">
        <?php wpe_excerpt('wpe_excerptlength_archive', ''); ?>
        <a class="morer" href="<?php the_permalink() ?>">Check this</a>
        <div class="clear"></div>
    </div>
</div>
</div>

<?php endwhile; ?>

<div class="clear"></div>

<?php getpagenavi(); ?>

<?php $wp_query = null; $wp_query = $temp;?>

</div>