problem updating avast

I have avast on both computers (1 pc and 1 notebook), on both the update is set on automatic and the type of connection on “always on”, the notebook give me a problem “can’t connect to download.avast.com 80 isn’t active” or something similar

i share the same connection using a router with nat activated

any idea?

Change (or add) AlwaysConnectedWaitSeconds value into the [InetWD] section of avast4.ini file.
You could set the number of seconds to wait before attempting to update. The default is 30 but it may not be enough in some DSL systems. In this case, you can try increasing this e.g. to 60 (1 minute). That should be enough.
More details here: http://forum.avast.com/index.php?board=2;action=display;threadid=1647

If you can’t manual update, please, check into the firewall settings, if the following programs are allowed to connect:
ashServ.exe (avast! antivirus service)
ashWebSv.exe (avast! Web Scanner) (allow server rights)
ashMaiSv.exe (avast! e-Mail Scanner Service) (allow email rights)
ashUpdSv.exe (avast! Update Service)
avast.setup (avast! Update executable)