Problem with updating engine and virus definitions

Hi everyone,

I’ve got the latest version of Avast Free Antivirus (7.0.1426) installed on Windows 7 SP1. It’s been a while i can’t update the engine and virus definition and it reads “Error: Cannot connect to server”. I’m living in Iran and my brother’s computer has the same problem. Anyone can help me?

http://forum.avast.com/index.php?topic=98814.msg789140#msg789140