Top Margin in the page

Hi I am doing the following

public class SpringVaadinApplication extends Application implements ApplicationContext.TransactionListener {

   	public SpringVaadinApplication(String applicationTitle) {

		body = new VerticalLayout();
		resultsLayout = new VerticalLayout();
		header = new VerticalLayout();
		resultsLabel = new Label();
		resultsTable = new UserResultsTable(); // Table with specific columns
		orderResultsTable = new Table();
		mainWindow = new Window(applicationTitle);

		body.setSpacing(true);
		body.setMargin(true);
		body.setHeight("100%");
	}

@Override
	public void init() {
		setTheme("runo");
		initLayout();
	}

	/*
	 * First method thats called from init
	 */
	private void initLayout() {

		// Set the scroll bar on the main window
		mainWindow.setScrollable(true);

		// Adding the body which is a vertical Layout to the mainWindow
		mainWindow.addComponent(header);
		mainWindow.addComponent(body);

		// Add the results vertical layout to the mainWindow
		resultsLayout.setSizeFull();
		mainWindow.addComponent(resultsLayout);

		// set the main Window
		setMainWindow(mainWindow);

		// Add the label which is the application title
		header.addComponent(new Label("<h2>" + applicationTitle + "</h2>", Label.CONTENT_XHTML));

		// Add a menubar
		// header.addComponent(buildMenuBar());
		header.addComponent(new BuildMenuBar(mainWindow, body, resultsLayout));

		

	}



}

THis is resulting in the page as shown in the attachment. I want to move the label to the top a little bit. Not wasting any space/margin. I tried playing with the margin , spacing but no sucess. would appreciate if anyone can tell me.