WP 2.04 – Categories in Alphabetical Order with Indented Children

I can’t get the categories on my sidebar to be listed in alphabetical order according to parent. I want the list to look something like this:

Parent A (# of posts)
— Child (# of posts)
— Child (# of posts)
Parent B (# of posts)
— Child (# of posts)
— Child (# of posts)

This is the code I’m using, what do I need to change?


<?php wp_list_cats('optioncount=1 sort_column=name'); ?>

Thank you for your help!