2.1 wp_list_pages

I have install the new wordpress 2.1 and when i want to have the supages i have use this code <?php wp_list_pages(‘child_of=4&title_li=’);?> but it dosent work.
look at https://fotadigitalt.se/?page_id=4
you can see the code in the page.
I write the code in the code vy. And when i whant to edit the code it be missing in the page.
What shell i do to have my subpages in wordpress 2.1
/Apel