Playing Age of Empires II online?

[Computerturbula]

I cant even play over Gamespy! it just says 'Unable to join game' in Age of Empires II.

I'm able to play multiplayer and single player without any cracks.

The only reason I can think of is my firewall.. its Norton Personal Firewall 2002, but even when I disable it, I still can't join any games..

Any ideas?

thanks