updating through iAVS

When I try to update through iAVS, I get the message box as attached below and the download has stopped. After an hour, I tried again and I got the same result.

How do I update?

Please look at avast4 forum category, sth like: http://www.avast.com/forum/index.php?board=2;action=display;threadid=1401. Thanks.

Besides pk advice…
Take a look at
http://www.avast.com/forum/index.php?board=2;action=display;threadid=1395
http://www.avast.com/forum/index.php?board=2;action=display;threadid=1398
http://www.avast.com/forum/index.php?board=2;action=display;threadid=1244
http://www.avast.com/forum/index.php?board=2;action=display;threadid=1399

Maybe some post could help you…