Hi what Axephilic mentioned is correct if you read in the BC news there is guide for users using Zone Alarm,
which also can be found on the top of this page. Also note that other firewalls such as comodo can lead to internet connection promblems. Its not because of the firewall its because you or someone else messed with something that cause the internet connection. My dad messed around with Comodo and then internet didn't work but I got it back again...Its probably Zone alarm that you are having difficulties with I would suggust reading that topic I mentioned at the top of the page.
Hope that helps and good luck