Use different templates? 🙂
You might wanna check your .htaccess or .php ini, this is most likely a configuration error.
<?php
global $id;
wp_list_pages("title_li=&child_of=$id&show_date=modified
&date_format=$date_format"); ?>
is the usually code, but that doesnt show the mainpage in the subpage (ye, its kinds weird..)
