I also had this same issue with my EQ2Maps and Norton internet security 2005. I did find a fix, though, and I hope it works for you.
Open Norton internet security.
Select the Personal Firewall, then click "Configure" on the right hand side of the screen.
Click the Programs tab and then click add. Find the EQ2Maps executable file and choose "permit all".
Click ok, exit out, and retry your EQ2Maps.
It should work
Good luck!