Configuration issue for assets

[pavan4]

could successfully host the fulcrum app on phusion but I am going nuts with some configuration issue

The application is picking up the url as

http://example.com/projects/4

instead of

http://example.com/fulcrum/projects/4

Could anyone point the mistake. I tried to change the assets.prefix in production.rb and recompile the assets but it only changes the location of the assets but doesn't change the root url in application.js

The app is hosted at

http://example.com/fulcrum
And the rest of the site is functional except for this jquery/ajax part.