try out: -cl -ip localhost
also check if your have a firewall blocking the server

also check out the Pong_multiplayer in the samples folder,
if that works.

Some small recent games of mine:
Griefer 4k http://damocles11.byethost9.com/griefer4k.html
Kobold 4k http://damocles11.byethost9.com/kobold.html
Cave 4k http://damocles11.byethost9.com/cave4k.html