Subcategory List Needed

I’m looking for a simple way to list the titles of the child categories of the category that your currently on. I’ve seen many plugins that list the available categories, or categories with recent posts and such, but none that are just a simple list of all available subcategories. Here’s what I’d like to see.

If your on the Main Category page, it looks like:

• Main Category

• Sub Category One

• Sub Sub Category One
• Sub Sub Category Two

• Sub Category Two

If your on the Sub Category One page, it looks like:

• Sub Category One

• Sub Sub Category One
• Sub Sub Category Two

If your on the Sub Category Two page, it looks like:

• Sub Category Two

Any ideas? I tried several plugins and tried wp_list_categories and I just can’t seem to make it work this way. I also need it to sort ascending by name. I would greatly appreciate any help on either code or a finding a plugin.

Thanks,
gw468