Postede på deres officielle forum uden megen held:
"I just downloaded and installed Filezilla Server for the first time, and when I try to connect to 127.0.0.1 on the default port I get the error message "Error: Could not connect to server". What is this caused by? I haven't got any other server running, I'm behing SP2 firewall and a Linksys router."
*Problemet er løst*