[TYPO3-mvc] fluidpages and pagecontroller (flux 7.3.0)

[nk x]

hi. 
i'm using fluidpages to manage backend/frontend layouts, what works fine.
i've problems getting the PageController Class to work.
it seems that the file does not get included (but Classes folder is loaded via composer)


here my setup:
#########################
#  setup.txt
#########################
plugin.tx_bootstrapsite {
	view {
		templateRootPaths.0 = {$plugin.tx_bootstrapsite.view.templateRootPaths.default}
		partialRootPaths.0 = {$plugin.tx_bootstrapsite.view.partialRootPaths.default}
		layoutRootPaths.0 = {$plugin.tx_bootstrapsite.view.layoutRootPaths.default}
	}
}

#########################
# ext_localconf.php:
#########################
\FluidTYPO3\Flux\Core::registerProviderExtensionKey('Hw.BootstrapSite', 'Page');
\FluidTYPO3\Flux\Core::registerProviderExtensionKey('Hw.BootstrapSite', 'Content');

#########################
# Classes/Controller/PageController.php
#########################
namespace Hw\BootstrapSite\Controller;
use TYPO3\CMS\Core\Utility\DebugUtility;
use FluidTYPO3\Fluidpages\Controller\PageController as AbstractController;
/**
 * Page Controller
 *
 * @route off
 */
class PageController extends AbstractController {
    public function initializeView(ViewInterface $view) {
      echo "foo";
        parent::initializeView($view);
      DebugUtility::printArray($view);
      die();
    }
}

##################################################


i'm also using the fluidcontentcore extension, but that should not disturb the fluidpages extension, right?
what i'm doing wrong?

excuse my english, thx for any helps.