Problems with DateField and Binding

I have problems with binding value in DateField. In ScheduleWindow i added DateField and bind it with value from Schedule class and i can't edit this value directly from window. I think that DateField in readOnly mode, but why ?
   

public class ScheduleWindow extends Window {

    public static final String ID = "schedulewindow";

    private final BeanFieldGroup<Schedule> fieldGroup;
    private WindowMode mode;
    private Button saveButton;

    @PropertyId("start")
    private DateField startDate;
    @PropertyId("end")
    private DateField endDate;

    public ScheduleWindow(Schedule schedule, WindowMode mode) {
        DashboardUI.getGlobalEventBus().register(this);
        this.mode = mode;
        addStyleName("profile-window");
        setId(ID);
        Responsive.makeResponsive(this);

        setModal(true);
        addCloseShortcut(KeyCode.ESCAPE, null);
        setResizable(false);
        setClosable(true);
        setHeight(90.0f, Unit.PERCENTAGE);

        VerticalLayout content = new VerticalLayout();
        content.setSizeFull();
        content.setMargin(new MarginInfo(true, false, false, false));
        setContent(content);

        TabSheet detailsWrapper = new TabSheet();
        detailsWrapper.setSizeFull();
        detailsWrapper.addStyleName(ValoTheme.TABSHEET_PADDED_TABBAR);
        detailsWrapper.addStyleName(ValoTheme.TABSHEET_ICONS_ON_TOP);
        detailsWrapper.addStyleName(ValoTheme.TABSHEET_CENTERED_TABS);
        content.addComponent(detailsWrapper);
        content.setExpandRatio(detailsWrapper, 1f);

        content.addComponent(buildFooter());
        detailsWrapper.addComponent(buildWindowContent());

        fieldGroup = new BeanFieldGroup<Schedule>(Schedule.class);
        fieldGroup.setItemDataSource(schedule);
        fieldGroup.bindMemberFields(this);
    }

    private Component buildWindowContent() {
        HorizontalLayout root = new HorizontalLayout();
        if (mode == WindowMode.ADD) {
            root.setCaption("Добавление");
        } else if (mode == WindowMode.EDIT) {
            root.setCaption("Редактирование");
        }
        root.setWidth(100.0f, Unit.PERCENTAGE);
        root.setSpacing(true);
        root.setMargin(true);
        root.addStyleName("profile-form");

        FormLayout details = new FormLayout();
        details.addStyleName(ValoTheme.FORMLAYOUT_LIGHT);
        root.addComponent(details);
        root.setExpandRatio(details, 1);
        Label lblHeader = new Label("Введите данные");
        lblHeader.addStyleName(ValoTheme.LABEL_H4);
        lblHeader.addStyleName(ValoTheme.LABEL_COLORED);
        details.addComponent(lblHeader);

        startDate = new DateField("Начало");
        startDate.setReadOnly(false);
        startDate.setLocale(Locale.getDefault());
        startDate.setResolution(Resolution.MINUTE);
        startDate.setEnabled(true);
        startDate.setRequired(true);
        details.addComponent(startDate);

        endDate = new DateField("Конец");
        endDate.setResolution(Resolution.MINUTE);
        details.addComponent(endDate);


        return root;
    }

    private Component buildFooter() {
        HorizontalLayout footer = new HorizontalLayout();
        footer.addStyleName(ValoTheme.WINDOW_BOTTOM_TOOLBAR);
        footer.setWidth(100.0f, Unit.PERCENTAGE);
        if (mode == WindowMode.ADD) {
            saveButton = new Button("Добавить запись");
        } else if (mode == WindowMode.EDIT) {
            saveButton = new Button("Отредактировать запись");
        }
        saveButton.addStyleName(ValoTheme.BUTTON_PRIMARY);
        saveButton.addClickListener(new ClickListener() {
            @Override
            public void buttonClick(ClickEvent event) {
                try {
                    if (fieldGroup.isValid()) {
                        fieldGroup.commit();
                        DashboardUI.getDataProvider().saveSchedule(fieldGroup.getItemDataSource().getBean());
                        Notification success = null;
                        if (mode == WindowMode.ADD) {
                            success = new Notification("Запись добавлена!");
                        } else if (mode == WindowMode.EDIT) {
                            success = new Notification("Запись отредактирована!");
                        }
                        success.setDelayMsec(2000);
                        success.setStyleName("bar success small");
                        success.setPosition(Position.BOTTOM_CENTER);
                        success.show(Page.getCurrent());
                        DashboardUI.getGlobalEventBus()
                        .post(new SchedueltDataUpdatedEvent());
                        close();
                    } else {
                        Notification.show("Введите все необходимые данные!", Type.WARNING_MESSAGE);
                    }
                } catch (CommitException e) {
                    Notification.show("Ошибка при добавлении записи!", Type.ERROR_MESSAGE);
                }

            }
        });
        saveButton.focus();
        footer.addComponent(saveButton);
        footer.setComponentAlignment(saveButton, Alignment.TOP_RIGHT);
        return footer;
    }

    @Override
    public void close() {
        DashboardUI.getGlobalEventBus().unregister(this);
        super.close();
    }
}