How to use Dependency Injection with Tapestry

I have a module class:

public class AppModule {
@Singleton
public static void bind(ServiceBinder binder) {
    binder.bind(MainPage.class, MainPageDesktop.class);
}

I wrote a code to registry that module:

    if (isDesktop()) {
        RegistryBuilder builder = new RegistryBuilder();
        builder.add(AppModule.class);
        Registry registry = builder.build();
        registry.performRegistryStartup();
    }

My MainPage class is: public abstract class MainPage

My MainPageDesktop class is: public class MainPageDesktop extends MainPage

My inject looks like that:

public class SimpleTest {
    @Inject
    MainPage page;

    @Test
    public void test() {
        if (page != null) {
            Log.info("Hello world");
        }
    }
 }

I received that page equals to null. What I do wrong?