Well, this is odd: I tried shutting down both the XP and ZA firewalls to no avail. However, I then removed ZA from startup and rebooted and it then worked. I have no idea why this happens because the ZA process is definitely killed when I shut it down... very, very odd!
So anyway, does anyone have any ideas on how I could get it to work with ZA? Anyone else had this experience?
Thanks for your help, I appreciate it!