Connect failed. Error=0x80043112

Hi Guys, I cant log into Smart FTP from the computer I am at, despite all my log in details being correct. I feel it may be a firewall problem? (I have zero experience with firewalls, other than their meaning/purpose) We have Kaspersky on this computer at work and even when I exit it completly, it still wont let me connect.
Here is the log....
[13:54:47] Resolving host name ""
[13:54:47] Connecting to Port: 21
[13:54:47] Connected to
[13:54:47] Server closed connection
[13:54:47] Connect failed. Error=0x80043112
[13:54:47] Waiting to retry (30s)...
Any help would be great, thanks!
Darren :)