Can't connect to any sites

After not having trouble for years, I cannot connect to any sites today (I have shut down and restarted my computer in case). I get the same message (three lines ending in the "Connecting to...") and then it just hangs -- no error, no log off, no connection.

LOG:
[05:56:55] SmartFTP v2.5.1008.5
[05:56:55] Resolving host name "nicolegunter.com"
[05:56:55] Connecting to 72.29.73.91 Port: 21

It seems another application installed on your computer is blocking SmartFTP from making a connection. Typically the application in question is a software firewall or antivirus product. Add SmartFTP to the exceptions in the application's settings and try again. If this doesn't work temporary uninstall your Antivirus and Software Firewall products.

Regards,
Mat