Problema com Tela que não aparece

Minha tela não ta aparecendo… Não sei por que…
Ele até chama a tela, executa o initialize() Mas nao aparece…
Alguem sabe pq…
Segue a tela abaixo

[code]package Telas;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import com.cloudgarden.resource.SWTResourceManager;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;

public class Observacoes extends Composite {
private Label LabelNaoVenda;
private Button bt_Salvar;
private Text ed_Obs;
private Button bt_Cancelar;

{
	//Register as a resource user - SWTResourceManager will
	//handle the obtaining and disposing of resources
	SWTResourceManager.registerResourceUser(this);
}

public Observacoes(Composite parent, int style) {
	super(parent, style);
	initialize();
}

private void initialize() {
	FormLayout thisLayout = new FormLayout();
	this.setLayout(thisLayout);
	{
		ed_Obs = new Text(this, SWT.MULTI | SWT.WRAP);
		ed_Obs.setText("Observações");
		FormData ed_ObsLData = new FormData();
		ed_ObsLData.width = 202;
		ed_ObsLData.height = 191;
		ed_ObsLData.left =  new FormAttachment(0, 1000, 5);
		ed_ObsLData.top =  new FormAttachment(0, 1000, 33);
		ed_Obs.setLayoutData(ed_ObsLData);
	}
	{
		bt_Cancelar = new Button(this, SWT.PUSH | SWT.CENTER);
		bt_Cancelar.setText("Voltar");
		FormData bt_CancelarLData = new FormData();
         bt_Cancelar.addListener(SWT.MouseUp, new Listener(){

            public void handleEvent(Event arg0) {
                Principal.trocarTela(Principal.CADASTROPEDIDOS);
            }

        });
		bt_CancelarLData.width = 84;
		bt_CancelarLData.height = 27;
		bt_CancelarLData.left =  new FormAttachment(0, 1000, 16);
		bt_CancelarLData.top =  new FormAttachment(0, 1000, 230);
		bt_Cancelar.setLayoutData(bt_CancelarLData);
		bt_Cancelar.setImage(SWTResourceManager.getImage("Telas/Imagens/Voltar.png"));
	}
	{
		bt_Salvar = new Button(this, SWT.PUSH | SWT.CENTER);
		bt_Salvar.setText("Salvar");
		FormData bt_SalvarLData = new FormData();
		bt_SalvarLData.width = 88;
		bt_SalvarLData.height = 27;
		bt_SalvarLData.left =  new FormAttachment(0, 1000, 106);
		bt_SalvarLData.top =  new FormAttachment(0, 1000, 230);
		bt_Salvar.setLayoutData(bt_SalvarLData);
		bt_Salvar.setImage(SWTResourceManager.getImage("Telas/Imagens/Salvar.png"));
	}
	{
		LabelNaoVenda = new Label(this, SWT.NONE);
		LabelNaoVenda.setText("Observações do Pedido");
		FormData LabelNaoVendaLData = new FormData();
		LabelNaoVendaLData.width = 208;
		LabelNaoVendaLData.height = 15;
		LabelNaoVendaLData.left =  new FormAttachment(0, 1000, 5);
		LabelNaoVendaLData.top =  new FormAttachment(0, 1000, 6);
		LabelNaoVenda.setLayoutData(LabelNaoVendaLData);
		LabelNaoVenda.setFont(SWTResourceManager.getFont("Segoe UI", 10, 1, false, false));
		LabelNaoVenda.setBackground(SWTResourceManager.getColor(64, 0, 128));
		LabelNaoVenda.setForeground(SWTResourceManager.getColor(255, 255, 255));
		LabelNaoVenda.setAlignment(SWT.CENTER);
	}
    pack();
	this.setSize(225, 277);
}

}[/code]