Avast blocks my access to internet

Avast Free Antivirus / Premium Security
1

I just installed Avast 4.8 Family edition. I entered the Lcence key I got by e-mail. But I can’t access now to internet unless I disable the protection from Avast. What shall I do ?

2

Which firewall do you use?
Into the firewall settings, the following programs should be allowed to connect:

C:\Program Files\Alwil Software\Avast4\ashWebSv.exe (avast! Web Scanner)
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe (avast! e-Mail Scanner Service)
C:\Program Files\Alwil Software\Avast4\Setup\avast.setup (avast! Update executable). This is a temporary file that just appears when an update (check) is about to launch, and disappears again afterwards.