If you have problems connectiong to FTP servers using Internet Explorer when your computer is behind a firewall, you need to enable passive mode so you can connect a different way.

1. In IE6 XP open the Tools tab -> go to Internet Options -> Advanced tab -> scroll down till you find "Use Passive FTP (for firewall and DSL modem compatibility)" -> TICK this setting -> hit Apply

This should resolve all problems with accessing FTP servers.