JavaFX 2 - Tableview Checkbox not showing value

I finally managed to track whenever a click happens on a checkbox in my GUI. But now it won't load the correct value of the CheckBox into the gui. Can anyone see what might be wrong? :)

roadtrainCol.setCellValueFactory(
            new Callback<CellDataFeatures<Spot,Boolean>,ObservableValue<Boolean>>()
            {
                public ObservableValue<Boolean> call(CellDataFeatures<Spot, Boolean> param) {
                    return param.getValue().getRoadtrain();
                }   
            });
    roadtrainCol.setCellFactory(col -> {
        CheckBoxTableCell<Spot, Boolean> cell = new CheckBoxTableCell<>(index -> {
            BooleanProperty active = new SimpleBooleanProperty();
            active.addListener((obs, wasActive, isNowActive) -> {
                System.out.println("del");
                rettedeSpots(tableViewId.getItems().get(index).getId());
            });
            return active ;
        });
        return cell ;
    });