Using FTPS behind a Cisco PIX firewall

I'm running a copy of the fantastic FileZilla FTP Server as I want to be able to do secure FTP connections to upload files for a ColdFusion application that I'm writing. I was having trouble with the connection however, it would connect and go through the authentication, but wouldn't provide me with a directory listing. I ended up finding this post in the FileZilla forums that provided me the solution.