SSL Handshake timed out

I have a problem when trying to connect avast to internet using 3G. It works fine when i connect wifi.
i tried to launch internet diagnosis on avast and the message is SSL Handshake timed out.
I tested the connection 3G and it works very fine

What do you mean by “avast”? Homepage avast.com or another site? The handshake could be blocked by your wifi router or firewall.