create an server, and set following as written:

server: bnc.example.org
port: 31337
enable Secure connection
server password: User/Network:Password

replace bnc.example.org with what stated on your email, replace "User" on password with your username replace Network as Network you want to connect, for example if your username is john, your network is ircnow and your account password is abc123 your server password would be: john/ircnow:abc123