Restler php returning 404 for all results

I've been looking into implementing a REST implementation for my API and came across Restler. I've installed Restler 2.0 and am using Apache and php > 5.3. My class is below:

Class Sample 
{
   function gettest()
   {
      return "This is a test";
   }
}

and the index.php is:

set_include_path(get_include_path() . PATH_SEPARATOR . '/path/to/restler/');
require_once('path/to/Sample.class.php');
spl_autoload_register('spl_autoload');
$r = new Restler();
$r->setSupportedFormats('JsonFormat');
$r->addAPIClass('Sample');
$r->handle();

and instead of using an .htaccess, I've included the following inside a

<Directory /path/to/REST_DIR>
    AllowOverride All
    Options +FollowSymLinks     
    DirectoryIndex index.php

RewriteEngine On
RewriteRule ^$ index.php [QSA,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [QSA,L]
Order deny,allow
    Allow from all

</Directory>

in my httpd.conf file (since it is supposed to be faster if you have access to edit it).

Whenever I try the following path:

http://www.myhost.com/REST_DIR/test/

I get:

{
  "error": {
    "code": 404,
    "message": "Not Found"
  }
}

Is there something I'm missing or some way to more thoroughly debug Restler to determine why it can't find the function gettest()?

Thanks in advance.

as per the current configuration you can expect result from http://www.myhost.com/REST_DIR/sample/test

If you want the url to be http://www.myhost.com/REST_DIR/test instead, change index.php as follows

set_include_path(get_include_path() . PATH_SEPARATOR . '/path/to/restler/');
require_once('path/to/Sample.class.php');
spl_autoload_register('spl_autoload');
$r = new Restler();
$r->setSupportedFormats('JsonFormat'); //not needed JSON is the default
$r->addAPIClass('Sample',''); // note the empty string
$r->handle();