FileZilla not working on Server 2008 R2

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I'm battling to get FileZilla working on Server 2008 R2. Until this morning, I had one 2008 and one XP machine, and always just used the XP one for FTP. I now have two 2008 machines and no FTP client. I'v tried the Network Wizard in FileFilla, and I have also tried switching off Windows Firewall, with no joy. It's worth mentioning that my XP machine was using the same modem/router, for an ADSL connection with dynamic external IP, and it was working.