Output of sub category’s of on archive page

Hello,

I’m trying to do the following, output a set of div’s of all the sub-category’s of the current category on an archive page.

Yesterday it all worked fine untill i added new subcategory’s to the system, out of the blue it stopped working. I have some doubts about my code but i really don’t get whats happening.

So there is NO output anymore, the whole div id=categoryblock is not even being echoed anymore..

Does any of you maybe see it?

<?php

 if (is_category()) {
  $this_category = get_category($cat);
  if (get_category_children($id) != "") {

	$args=array(
    'show_option_all' => '', 'orderby' => 'name',
		'order' => 'ASC', 'show_last_update' => 0,
		'style' => 'list',
		'show_count' => 0,
		'hide_empty' => 0,
		 'use_desc_for_title' => 1,
		'child_of' => $id,
		'feed' => '',
		 'feed_type' => '',
		'feed_image' => '',
		'parent' => $id,
		 'exclude' => '1',
		 'current_category' => 0,
		'hierarchical' => true, 'title_li' => __( 'Categories' ),
		'echo' => 1, 'depth' => 0

  );
 ?>
  <div id="categoryblock">
  <?php

$categories=get_categories($args);
  foreach($categories as $category) {
    echo ' <div class="categoryblock"><h3> <a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "Bekijk alle berichten in %s" ), $category->name ) . '" ' . '>' . $category->name.'</a> </h3> ';
    echo '<p> <a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "Bekijk alle berichten in %s" ), $category->name ) . '" ' . '>'. $category->description . '/a></p></div>';
     }
echo "</div>";
  }
}
?>