Sorry,
I use AmiTradeCenter on my Amiga to do that...
Can't remember why I didn't use AmiFTP.. Might have been the license key???
As for Filezilla FTP server, make sure you test it so you know it's an Amiga issue.
First, make sure you can FTP from your Windows 7 machine.
(Command prompt - ftp 127.0.0.1, etc...)
Then, if you have another network machine, use that.
I seem to remember, running Filezilla Server under XP, there was some Windows firewall stuff I needed to do.
desiv