codeigniter+HMVC cross module call controller->method

I am pulling all my hair off... Have been searching every thread, would appreciate if someone can point me to a working example. Accroding to the doc: https://bitbucket.org/wiredesignz/codeigniter-modular-extensions-hmvc I can call another module->controller using ``` modules::run('module/controller/method', $params); modules::load('module/controller/method', $params); or $this->load->module('module/controller'); $this->controller->method(); ``` Problem: the "method()" is never called. only constructor of the controller is called every time. The objective is to build self-contained MVCs as module and use by other controllers. But no matter what I do, it only calls the constructor, method is not called. I started using HMVC a few weeks ago, did I miss something in the doc or it is not used this way? Here is the setup: ``` modules |--ztest1 | |--controller/c1.php |--ztest2 |--controller/c2.php class C1 extends MX_Controller { function __construct() { parent::__construct(); } function index () { Modules::run('ztest2/c2/testc2/'); //Modules::load('ztest2/c2/testc2/'); //$this->load->module('ztest2/c2/testc2/'); //$this->c2->testc2(); } } class C2 extends MX_Controller { function __construct() { parent::__construct(); echo __FILE__." // ".__CLASS__."/".__FUNCTION__.PHP_EOL; } function testc2(){ echo __FILE__." // ".__CLASS__."/".__FUNCTION__.PHP_EOL; } } output: /app/modules/ztest2/controllers/c2.php // C2/__construct ``` additional note: no error or warning with the script. It just quietly calls the constructor.