How can I change my FictionPress username?

[Question]

Go to your account - settings page (what you get to when you log in or you can click your username when you're on the FP homepage)
Under Account Settings there's a thing that says Pen Name with your pen name, and a link beside it that says Change. Click on it and follow the directions.

It's very clear once you get to account settings, but maybe you can't change it because the name's already taken?
Hope this helps, anyway.