Thats because the one ur trying to connect to is the 0.2.1 Main server, we only have a test server currently for 0.2.2, if u wish to go on the main 0.2.1 server re-install 0.2.1.
P.S heres the IP for the Argonath 0.2.2 test server: 89.149.196.238:7778