An Error Was Encountered. Unable to load the requested class: dx_auth - But local copy works fine!

Code:
class MY_Loader extends CI_Loader {



    function _ci_load_class($class, $params = NULL, $object_name = NULL)

    {    

        // Get the class name, and while we're at it trim any slashes.  

        // The directory path can be included as part of the class name, 

        // but we don't want a leading slash

        $class = str_replace(EXT, '', trim($class, '/'));

    

        // Was the path included with the class name?

        // We look for a slash to determine this

        $subdir = '';

        if (strpos($class, '/') !== FALSE)

        {

            // explode the path so we can separate the filename from the path

            $x = explode('/', $class);    

            

            // Reset the $class variable now that we know the actual filename

            $class = end($x);

            

            // Kill the filename from the array

            unset($x[count($x)-1]);

            

            // Glue the path back together, sans filename

            $subdir = implode($x, '/').'/';

        }



        // We'll test for both lowercase and capitalized versions of the file name

        foreach (array(ucfirst($class), strtolower($class)) as $class)

        {

            $subclass = APPPATH.'libraries/'.$subdir.config_item('subclass_prefix').$class.EXT;



            // Is this a class extension request?            

            if (file_exists($subclass))

            {

                $baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT;

                

                if ( ! file_exists($baseclass))

                {

                    log_message('error', "Unable to load the requested class: ".$class);

                    show_error("Unable to load the requested class: ".$class);

                }



                // Safety:  Was the class already loaded by a previous call?

                if (in_array($subclass, $this->_ci_loaded_files))

                {

                    // Before we deem this to be a duplicate request, let's see

                    // if a custom object name is being supplied.  If so, we'll

                    // return a new instance of the object

                    if ( ! is_null($object_name))

                    {

                        $CI =& get_instance();

                        if ( ! isset($CI->$object_name))

                        {

                            return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);            

                        }

                    }

                    

                    $is_duplicate = TRUE;

                    log_message('debug', $class." class already loaded. Second attempt ignored.");

                    return;

                }

    

                include_once($baseclass);                

                include_once($subclass);

                $this->_ci_loaded_files[] = $subclass;

    

                return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);            

            }

        

            // Lets search for the requested library file and load it.

            $is_duplicate = FALSE;        

            for ($i = 1; $i < 3; $i++)

            {

                $path = ($i % 2) ? APPPATH : BASEPATH;    

                $filepath = $path.'libraries/'.$subdir.$class.EXT;

                

                // Does the file exist?  No?  Bummer...

                if ( ! file_exists($filepath))

                {

                    continue;

                }

                

                // Safety:  Was the class already loaded by a previous call?

                if (in_array($filepath, $this->_ci_loaded_files))

                {

                    // Before we deem this to be a duplicate request, let's see

                    // if a custom object name is being supplied.  If so, we'll

                    // return a new instance of the object

                    if ( ! is_null($object_name))

                    {

                        $CI =& get_instance();

                        if ( ! isset($CI->$object_name))

                        {

                            return $this->_ci_init_class($class, '', $params, $object_name);

                        }

                    }

                

                    $is_duplicate = TRUE;

                    log_message('debug', $class." class already loaded. Second attempt ignored.");

                    return;

                }

                

                include_once($filepath);

                $this->_ci_loaded_files[] = $filepath;

                return $this->_ci_init_class($class, '', $params, $object_name);

            }

        } // END FOREACH



        // One last attempt.  Maybe the library is in a subdirectory, but it wasn't specified?

        if ($subdir == '')

        {

            $path = strtolower($class).'/'.$class;

            return $this->_ci_load_class($path, $params);

        }

        

        // If we got this far we were unable to find the requested class.

        // We do not issue errors if the load call failed due to a duplicate request

        if ($is_duplicate == FALSE)

        {

            log_message('error', "Unable to load the requested class: ".$class);

            show_error("Unable to load the requested class: ".$class);

        }

    }

}