CI on NginX

[eluser]anishpsla[/eluser]
I am facing a strange problem. I transfer all files into the production server. Which is a NginX server on Ubuntu. Now I am facing a strange problem. When I try to access controller other than the default controller, the page redirect to root. I install the application on CI folder. I change the configuration file. Still it redirect to / of the server.

eg:

http://domain/ci and http://domain/ci/index.php -> display the default controller.
http://domain/[any controller] -> redirect to root (http://domain/) of the webserver

My development server is IIS 7.5 express on Windows XP (Works great. Super fast and easy to setup).