Zone Alarm is pretty buggy...you might want to look for an alternative....like buying a real firewall (i.e. SonicWall, NetGuard, PIX, etc). I know these are a bit more expensive than the software alternative, but you get what you pay for. ZoneAlarm is weak at best, not to meantion the limits it puts on the user of the PC. SonicWall Soho10 is a nice alternative.

Peace!