Problem with host machine?!

As soon as I login to my FTP server, within 20 seconds I receive this:

[16:27:51] An established connection was aborted by the software in your host machine.
[16:27:51] Server closed connection

WHAT DOES THAT EVEN MEAN? I turned off Norton Auto-Protect and made an except for SmartFTP on my windows firewall.

Please post the complete log.