Show recently updated posts in sidebar

Hello there, I have been trying to show 5 recently modified posts in my wordpress blog but the code doesn’t seem to work. I add this code in the ‘text’ widget in the sidebar but it doesn’t work.

Here is the code:

<?php
$args=array(
  'orderby'=> 'modified',
  'order' => 'ASC',
  'post_type' => 'post',
  'post_status' => 'publish',
  'posts_per_page' => 5,
  'caller_get_posts'=> 1
);
$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
  while ($my_query->have_posts()) : $my_query->the_post(); ?>
    <p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></p>
    <?php
  endwhile;
}
wp_reset_query();  // Restore global post data stomped by the_post().
?>

Any idea what’s wrong here?

Here is the link to my website: http://androidgameapks.com/the-simpsons-tapped-out-cheat-apk-unlimited-money-xp-and-donuts/

Notice the code on the right sidebar on the top