SpringLayout problem

Hello, all !!!

Could somebody explain, why my JDialog with SpringLayout doesn't work:

....
public class OptionsDialog extends JDialog
{
JLabel label;

public OptionsDialog()
{
Container pane = getContentPane( );

SpringLayout layout = new SpringLayout();
pane.setLayout( layout);

label = new JLabel("Select plugins directory: ");

pane.add(label) ;

layout.putConst raint(SpringLay out.WEST, label, 20, SpringLayout.WE ST,
pane);
layout.putConst raint(SpringLay out.NORTH, label, 20,
SpringLayout.NO RTH, pane);

pack();
setVisible(true );
}

public static void main(String args[])
{
OptionsDialog dlg = new OptionsDialog() ;
}
}

Dialog has only title and no even space for label.

Thanx.