setTranslate() doesn't work in nested panes in JavaFX - javafx

Question

I am working on a GUI, where I need to move objects in exact part of GUI. Main windows is split into few parts and I want to be able to move objects in one of these parts.
I tried to write simple code, where I just move simple rectangle in root Group, to understand how transition translation works. Everything went well. When I wanted to do the exact same thing in my GUI (in one of nested Group), it didn't work.
It shows, that new translations were set to object, but object didn't move at all.
I did the exact same thing, except Groupt isn't root.
Code:
/* imports, main() */
public void start(Stage primaryStage) throws Exception {
Button tmpButton = new Button("Just fill the space");
Rectangle rect = new Rectangle(0, 0, 20, 20);
rect.setOnMousePressed(mousePressedEvent);
rect.setOnMouseDragged(mouseDraggedEvent);
Group movablePlace = new Group();
movablePlace.getChildren().add(rect);
VBox root = new Root();
root.geChildren().addAll(tmpButton, movablePlace);
primaryStage.setScene(new Scene(root, 500, 400));
primaryStage.show();
}
EventHandler<MouseEvent> mousePressedEvent = new EventHandler<MouseEvent>() {
/* getting coordinates works fine */
};
EventHandler<MouseEvent> mouseDraggedEvent = new EventHandler<MouseEvent>() {
public void handle(MouseEvent event) {
/* actualize new coordinates and offset - works fine */
((Rectangle)event.getSource).setTranslateX(newTranslationX);
((Rectangle)event.getSource).setTranslateY(newTranslationY);
/* translations of rectangle are set correctly, but it doesn't move */
}
};
Can someone clear up to me, what I did wrong or misunderstood?
Thank you!