Openid in rails

Hello,
I have implement ‘acts_as_authenticate’ in my application,I have
followed all steps given in readme file.
Even tried to run application given at
http://railskits.com/openid/’.
And getting exception: " Sorry, the OpenID server couldn’t be found"

Not getting what goes wrong.

Can anybody help me?

My rails version is 2.1.0 and ruby-openid (2.1.2)