this is the Zend Controller Dispatcher Standart

 public function isDispatchable(Zend_Controller_Request_Abstract $request)
{
    $className = $this->getControllerClass($request);
    echo 'is dispatchanble started';
    var_dump($className);
    if (!$className) {
        return false;
    }
    var_dump(class_exists($className, false));
    if (class_exists($className, false)) {
        return true;
    }

    $fileSpec    = $this->classToFilename($className);
    $dispatchDir = $this->getDispatchDirectory();
    $test        = $dispatchDir . DIRECTORY_SEPARATOR . $fileSpec;
    return Zend_Loader::isReadable($test);
}

I need to set up custom modular structure and loading just using plugins (I need to setup the path where zend looks for controller), so I am stuck

tracing down I came to the isDispatchable method that returns false and consequently the dispatching returns error . This method returns false because class_exists return false , it is surely has to do with auto loading ,but confused. help will be appreciated,though I got the feeling that I am looking at wrong place.