Mailchimp library is not being loaded

<?php

//~ include_once 'rpj_mailer.template.inc';


/**
 * Implements hook_libraries_info().
 */
function rpj_mailer_libraries_info() {
  $libraries['mailchimp'] = array(
    'name' => 'MailChimp API',
    'vendor url' => 'http://apidocs.mailchimp.com/api/2.0',
    'version arguments' => array(
      'file' => 'mailchimp/src/Mailchimp.php',
      'pattern' => '/\$version = \"((\d+)\.(\d+))\"/',
      'lines' => '120',
    ),
    'files' => array(
      'php' => array('mailchimp/src/Mailchimp.php'),
    ),
  );

  return $libraries;
}

/**
 * Get a Mailchimp API object for communication with the mailchimp server.
 */
//~ function rpj_mailer_get_mc_object() {
  //~ $library = libraries_load('mailchimp');
  //~ return new Mailchimp('95d6d5509ff7f152979d15d814d407e3-us8');
//~ }
//~
function rpj_mailer_init() {
  $library = libraries_load('mailchimp');
  print_r($library);
  // ERROR HERE: Error: Class 'Mailchimp' not found in /home/edutrul/Projects/rpjobsity/sites/all/modules/custom/rpj_mailer/rpj_mailer.module, line 31
  $mailchimp = new Mailchimp('95d6d5509ff7f152979d15d814d407e3-us8');
  $mailchimp_lists = new Mailchimp_Lists($mailchimp);
  print_r($mailchimp_lists);
  print 'MAILCHIMP LISTS: ' . '<br>';
  print '================ ' . '<br>';
  print '================ ' . '<br>';
  print 'getList(): ' . '<br>';
  print_r($mailchimp_lists->getList());  ///< has parameters $start, limit, etc.
  exit();
}