I couldn't find the line it says to delete. There is another link to the Avast site. Evidently Zone Alarm blocks Avast from assessing the Internet but it can be worked around.

http://www.avast.com/eng/webshield_issues.html#idt_6867

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A little common sense goes a long way

Later Grandpa

This is what was suggested
If you are using ZoneAlarm Free you should click NO, because privacy features are not present in ZoneAlarm Free this will not turn off web shield transparent mode proxy.
Use a text editor and edit the avast4.ini file, the default installation location is C:\Program Files\Alwil Software\Avast4\DATA\avast4.ini (I would advise you copy avast4.ini before editing it, just in case).
Locate the line containing ZoneAlarmCompatibility= and delete that line. Save the edited avast4.ini file.

If you are using ZoneAlarm Pro and Privacy Control in ZoneAlarm is set to High and if you click YES in avast compatibility dialogue box the transparent mode proxy in web shield will be turned off you have to manually configure browser to access internet. To manually configure your browser watch instructional video

Can you make heads or tails of that???