Well, TS2 RC1 is now the old and busted. It is no longer supported and it will not work. I have put up a temporary server at gren.no-ip.com. You will need the new TS2 RC2 Client in order to access the server. The teamspeak website is also currently down so if you can't get it from them you can grab it off the cogops public ftp.
Links: TS2 RC2 Client & TS2 RC2 Server.
Links: TS2 RC2 Client & TS2 RC2 Server.