I can see the directory via your link, but when I try clicking on a file or directory I eventually get a message that there was "a problem" with it. This might be due to my browser's passive FTP. I will try it again on another box here which has a real FTP client.

Why the php page instead of a regular FTP address? Such as ftp://macplus.vanegten.com? I would like to hear more about why you chose to implement things this way.