Yep, AVG seems to be the issue: VII. Can't connect to any Server (Vista)Norton, mcafee securityCenter or Kaspersky aren't allowed to be on your PC, deactivating them don't do it!, if you have Avast! you have to deinstall the NetworkShield.
The problem is freelancer not CF Well you could try AVG again but uninstalling every network assistants from it . Otherwise you have to use another antivirus (I know that avira antivir is working very good with FL + its free and still a nice antivirus)