I registered and activated an account at
http://www.burbworld.com/fs2netd/register.php (account name Gene). Then I launched FreeSpace, made a pilot "Gene" in multiplayer mode, and in the multiplayer options (in the PXO box) typed "Gene" as the username, and the password is matching the one I registered at burbworld.
I also copied the file fs2open_pxo[1].cfg.fs2 into my /data/ directory of the FS2 SCP installation.
When I try to connect, it says "FS2Net connection failed".
I use a cable modem, and I'm behind a Linksys router if that might be the problem. I'm not behind any firewalls.
Can anyone help?