Basic Codeigniter HMVC Installation

I have a existing working installation of CI 2.02 that autoloads libraries and helpers. When I perform the HMVC installation by dropping the core and 3rd party files into their respective locations in the CI directory, I get the error

Fatal error: Cannot access empty property in C:\xampp\htdocs\APPNAME\application\third_party\MX\Loader.php on line 208 

When I remove all helpers from application/config/autoload.php, i get

An Error Was Encountered
Unable to load the requested file: helpers/_helper.php 

When I use a clean CI installation with no libraries or helpers autoloading, it works fine. What should I do to get HMVC and autoloading to work?

I installed HMVC by following the instructions on their website (https://bitbucket.org开发者_运维百科/wiredesignz/codeigniter-modular-extensions-hmvc/wiki/Home). I only did Step 15 and doing Step 6 shows the error I mentioned earlier. I have a single controller file in /application/controllers, a single model file in /application/models and a single view file in /application/views which I move to /application/modules/site/controllers, /application/modules/site/models and /application/modules/site/views respectively. I left the config.php, autoload.php anad database.php as they are in the application folder.

Before installing HMVC (performing Steps 1-6 from their website), I already have a existing CI project. I am autoloading some libraries and helpers (database, session, file, url, forms, text) using application/config/autoload.php.

Is there any more info that I need to show to figure out where the problem lies in? This is my first CI project so its nothing fancy. Thanks!

Upgrade to 2.0.3 and the latest version of HMVC, it should work fine.