Removing Children Categories from list

I’m using the code I found in the codex to make it so the children of a certain category do not show but they are still showing.

This is what I’m using (category 5 that I am excluding is also the categories children that I do know want to show)

<?php wp_list_cats('sort_column=name&optioncount=0&hierarchical=0&exclude=5&children=0'); ?>

Am I doing something wrong?

Thanks for any help,
Lindsey