JOptionPane.showMessageDialog BLOCKS my application

Question

ohhhhhhhh, this one drives me crazy.
The code below will show the message "msg: 884R, Chcek your account!" when the user log to the system.
THE PROBLEM: say the user activate the application and recieved this message, and then he switches to a different application (e.g, IE) and returns to the application - HE DOESN'T SEE THE MESSAGE, hence, the application is BLOCKED!!! :-(
ANYONE???!?!?!
if (secDB.pendingUsers())
Component c = SwingUtilities.getRoot((Component)e.getSource());
JFrame parentFrame = (JFrame)c;                              JOptionPane.showMessageDialog(parentFrame, "msg: 884R, Chcek your account!");
}

Answer 1

It works for meimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test3 extends JFrame {
  public Test3() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = getContentPane();
    JButton jb = new JButton("Show Optionpane");
    content.add(jb, BorderLayout.SOUTH);
    jb.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        JOptionPane.showMessageDialog(SwingUtilities.getRoot((Component)ae.getSource()),
                                      "This is a message");
    setSize(300,300);
    setVisible(true);
  public static void main(String[] args) { new Test3(); }
}