GoogleTalk failure

I am using the nightly build of smack(smack-dev-2006-09-21). When I try to use GoogleTalkConnection, I get “SASL authentication failed” error messages though the credentials supplied are correct. The code is as foll:

GoogleTalkConnection gtalk = new GoogleTalkConnection();

gtalk.connect();

gtalk.login(“xxx”, “yyy”,“smack”);

gtalk.createChat("zzz@gmail.com").sendMessage(“Howdy!”);

gtalk.disconnect();

Am I doing something wrong? Or did google change thier port number?

Thanks in advance