Why simple when you can make it complicated?
Since version 3.2.4 of FileZilla , the LIST command has been replaced by the MLSD command ... that is not supported by all versions of FTP servers (even if the specification is several years old) ...
Conclusion: Stay in version 3.2.3 if you throw your server 
Question: how to access the SSH server from his job when firewalls block access to port 22?
Answer: by using port forwarding!
Here it is, the new version of Ubuntu is out since yesterday!
All procedures update is here
WARNING, the Live Update requires Ubuntu 8.10!
For those who do everything in command line:
sudo apt-get install update-manager-core
sudo do-release-upgrade
