Adding stylesheets for an internal page only I am trying to add a CSS file to a specific internal basic page in Drupal 7 with no success.
After enabling the clean URL paths and add a path for my internal basic page I am able to capture the path using $path=drupal_get_path_alias();.

After that, I am trying to put condition statements so when a specific path is loaded a specific CSS file is loaded. I have this piece of code in ninesixty_preprocess_page(&amp;$vars, $hook) in the template.php file. 

if($path == 'about/advantages') {
  drupal_add_css(drupal_get_path('theme', 'ninesixty') . "/page-about.css");
}


I have tested the IF-statement by echoing the $path variable with total success. The page-about.css file does not load at all, though.

Please note that I am using Drupal with WAMP server, and the page-about.css file is located under drupal/sites/all/themes/ninesixty/styles/framework.
The path is incorrect; it should be as in the following code.

if ($path == 'about/advantages') {
  drupal_add_css(drupal_get_path('theme', 'ninesixty') . "/styles/framework/page-about.css"); 
}