wp_list_pages child_of

<div id="content" class="narrowcolumn">
<?php wp_list_pages("title_li=&child_of=29&show_date=modified");?>
</div>

Anyone know why this isn’t outputting the list of pages? Essentially, I don’t want my full list of articles to show in the sidebar (got that working like I want) but I want the articles page to be just a list of articles. The code above is in a page template called articleslist.php. Thanks for any help.