CSS and images cannot be read on server when deployed

Dear all

I deployed rail app. but the app does not see the CSS files and the
images
basically it does not see the public directory

i created the softlink ln -s /home/<username>/rails/app/public /home/
<username>/public_html
the application is ruinning but without CSS or images

what is the solution
the webserver is apache 2 as i knew from the host company

Thanks