I have two computers with Windows XP Home and Professional connected via router in a network. Both computers use firewall ZoneAlarm Pro and antivirus nod32.Everything seems all right when both of them are in some work. But if one of them is switched off or hibernated it takes about 30 seconds or even more to open a file on the working computer. If I shutdown ZoneAlarm on a computer, the problem vanishes. So it is the problem of ZA configuration as it seems to me. If anybody has a clue to the problem the help will be appreciated.
Net and DHCP Server are in the trusted zone.

Operating System:Windows XP Home Edition
Software Version:7.0
Product Name:ZoneAlarm Pro