[SMARTY] Problem when moving directories

I have been developing a website using smarty on my local (linux)
server.  It has been working OK so far. I have a file called setup.php
which includes:

***************************************************
define('SMARTY_DIR', '/usr/share/php/smarty/libs/');
require(SMARTY_DIR . 'Smarty.class.php');

class Smarty_Test extends Smarty {

   function Smarty_Website(){

        $this->Smarty();
        $this->template_dir = '/var/www/html/foobar/public_html/templates';
        $this->compile_dir  = '/var/www/html/foobar/public_html/templates_c';
        $this->config_dir   = '/var/www/html/foobar/public_html/configs';
        $this->cache_dir   = '/var/www/html/foobar/public_html/cache';

        $this->caching = true;
        $this->assign('app_name', 'test');
   }
}
***************************************************

This file is required() by the index.php page.

However, when I tried moving all the directories (cache, config,
template, template_c) and associated files except the index.php page
to one level above public_html (../) I get the following error
message:

(Warning: Smarty error: unable to read resource: "type1.tpl" in
/usr/share/php/smarty/libs/Smarty.class.php on line 1088)

"type1.tpl" is my index.tpl page.

I changed the references from...

        $this->template_dir = '/var/www/html/foobar/public_html/templates';
        $this->compile_dir  = '/var/www/html/foobar/public_html/templates_c';
        $this->config_dir   = '/var/www/html/foobar/public_html/configs';
        $this->cache_dir   = '/var/www/html/foobar/public_html/cache';

to...
        $this->template_dir = '/var/www/html/foobar/templates';
        $this->compile_dir  = '/var/www/html/foobar/templates_c';
        $this->config_dir   = '/var/www/html/foobar/configs';
        $this->cache_dir   = '/var/www/html/foobar/cache';

Is there another configuration that needs to be changed that I am not
thinking about?  Again, this works fine before trying to move the
directories.

Any ideas?

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