[eluser]Peng Kong[/eluser]
your server seems perfectly fine. that 503 thing isn't important i think. cuz my server has the exact same thing but it still works. oh.... SSL is your page using SSL. for google it's a must
ah yes im quite sure that's the problem... no https on your signin page which is a must for google. you openid should work if you try with chi.mp or myopenid or try with AOL or myspace