Filezilla: cannot display directory listing over internet

i am running tzo.com web forwarding service, and filezilla 0.9.4d ftp server. i am behind a dynamic dsl connection. tzo.com enables me to run as a domain now, i can connect to my site www.mysite.tzo.com over the internet without any problems.

when i use my ftp i can login while on my local network using ftp.mysite.com port 1102. port 1102 is set in my linksys router to forward to the ftp server running. from home however i cannot finish connecting properly.

i have the ftp server set to never time out connections, and have tried both passive and non passive modes on the client.
i am able to log in to the server so i know my login and password are correct, but the 'retrieving directory listings' command never finishes. i left it running for nearly 2 hours on friday and no data populated.

does anyone have any suggestions about how to accomplish this?