Can't get this plugin to work

I was hoping I could get some assistance on getting this plugin to work. I’ve been trying for hours without any luck (and no, I don’t want to use the Javascript library).

I have the plugin activated in the admin section of my site.

Here is the functions.php snippet:

function intranet_theme_styles() {
   wp_enqueue_style('bootstrap', get_template_directory_uri() . '/css/bootstrap.min.css');
   wp_enqueue_style('bootstrap.responsive', get_template_directory_uri() . '/css/bootstrap-responsive.min.css');
   wp_enqueue_style('intranet', get_template_directory_uri() . '/css/intranet.less');
}

add_action('wp_enqueue_scripts', 'intranet_theme_styles');

The file is never compiled. I always end up with a 404:

"NetworkError: 404 Not Found - http://10.z.y.x/wp-content/uploads/wp-less/intranet/css/intranet-6be3345c6f.css"

I have 777 permissions on all folders from /uploads/wp-less/intranet/css.

Does anyone have any ideas for what I’m doing wrong?

http://wordpress.org/extend/plugins/wp-less/