Custom Application

Hi!
i try to use standalone ParaView main window and Custom App.
i try to open PVD set of VTU files.
But, when i try pqFileDialog, the plugin is abscent.
The problem i think, Paraview initializing is
InitializerT::Status status = pvInitializer.Initialize(argc, argv);
but standalone app is just
pqPVApplicationCore appCore(argc, argv);