please help on ray

I have installed ray.

i have done what is says on readme.

after doing this i went to my admin and click on plugin and ray but now nothing happen at wall. before this upreade my plugin window was opening but now nothing is happening.

please advice me what is difference in these two:

Copy "ray" folder to your site root directory and run "http://[your_site]/ray/install/" to install the script.
This package contains the next elements:

1. “ray” folder contains the basic files necessary for Ray operation as a whole, and an installation interface for detached widgets. Copy the folder to the server, for example, to the public_html folder and run instalation wizard. following the next URL: http://www.your_domain.com/path_to_ray/install/index.php. Don’t forget to replace your_domain and path_to_ray with your site data.

i am lost on bold part because to me both parts look same.

please advice me

thank you

ujjawal