vsftpd+ssl

I am not sure if this is the right forum to put the question, but here goes anyway

I have installed a vsftpd server on my ubuntu 8.04 desktop. The thing is that i want it to use ssl.

This is a section from my vsftpd.conf file

ssl_enable=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=YES
ssl_sslv3=YES

pasv_enable=YES
pasv_promiscuous=YES
pasv_min_port=2101
pasv_max_port=2101

I have opened port 20, 21, 2101 in my server firewall, and i have port forwarded the respective ports from the router to the server. But when i try to connect from outside the router i am not able to get a directory listing, i am however able to connect to the server. Moreover i am able to use the server when i am on the local LAN .

Any ideas of what to do in order to acces the server from "the outside"?