Simpel Applet virker ikke, hvorfor?

Hvorfor er det lige at nedenstående Applet ikke virker i en browser...? I AppletVieweren virker det dog fint som det skal.

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class Test extends Applet implements MouseListener
{
  Point mouseDown = null;

  public void init()
  {
    addMouseListener(this);
  }

  public void paint(Graphics g)
  {
    if (mouseDown != null)
      g.drawString("Her", (int) mouseDown.getX(), (int) mouseDown.getY());     
  }
   
  public void mouseClicked(MouseEvent e)
  {
    mouseDown = new Point((int) e.getX(), (int) e.getY());
    repaint();
  }
 
  public void mousePressed(MouseEvent e) {}
  public void mouseReleased(MouseEvent e) {}
  public void mouseEntered(MouseEvent e) {}
  public void mouseExited(MouseEvent e) {}
}