JSplitPane with external panel

Question

Hi,
I want to use a JSplitPane wich:
Displays a JTree in the left-component
Displays application selected from JTree in right-component
Sounds simple. The right-component has a 'card-deck' which will
swap whenever an other application is selected in the JTree.
I have written a short test which does almost exactly what I want.
Problem is that a panel, which was a standalone Frame-app first,
is not shown in the right-component (but it is running!)
It seems that cannot put a standalone application (extending a JFrame) on a component.
So I decided to change the application and use a JPanel in stead
of a JFrame. The panel is accepted but isn't shown. (application is
running though).
I created a short testpanel_class which should be shown when
the first app is selected from JTree.
Current Result when JSplitPane-app is started
==> I get the 'home'-card first
==> When App2 is selected, I get correct card
==> When App1 is selected, the right-component is blank (app runs!)
Herewith the codesnippet of my JSplitPane-app which is showing
how I put the components on the left/right components:
===================================================
     private JSplitPane getJSplitPane() {
          if (jSplitPane == null) {
               jLabel = new JLabel("Tekst");
               jSplitPane = new JSplitPane();
               jSplitPane.setLeftComponent(getJTree());               
               myPanel.setLayout(new BorderLayout());
               pCards.setLayout(cardlayout);
               pCards.add("home", new JLabel("Home"));
               pCards.add("App1", new SplitBasePanel());
               pCards.add("App2", new JLabel("Menu2 Selected"));
               myPanel.add(pCards, BorderLayout.CENTER);
               myApp.getViewport().add(myPanel);
               jSplitPane.setRightComponent(myApp);
          return jSplitPane;
===================================================
And I swap the cards as follows:
===================================================
     public void valueChanged(TreeSelectionEvent event) {
          if (!firstRun){
System.out.println
("Current Selection: " +
jTree.getLastSelectedPathComponent().toString());
if ((jTree.getLastSelectedPathComponent().toString()).equals("App 1")){
               cardlayout.show(pCards, "App1");
if ((jTree.getLastSelectedPathComponent().toString()).equals("App 2")){
               cardlayout.show(pCards, "App2");
          firstRun = false;
======================================================
Here is my application-panel to be shown
=================================
package application;
import javax.swing.*;
import java.awt.*;
public class SplitBasePanel
     extends JPanel {
     // Panel Layout
     private JPanel c = new JPanel();
     // APPLICATION BASE FRAME
     public SplitBasePanel() {
     // Create Application panel
     c.setLayout(new BorderLayout());
     // Initialize CardDeck with basepanels
     c.add(new JLabel("my External Application"), BorderLayout.CENTER);
}

Answer 1

a) Sorry for the "code"-formatting, i just copy & paste from my developersoft.
b) SSCCE ????
c) I have placed this in this forum because it is not only a question about usage of swing components but also about the concept I try to implement. Maybe what I'm trying to do is just not the right concept !
d) what do you mean by your final remark (history reply postings)?
I do not make daily usage of this Developer Forums. So please forgive me when I don't follow the rules completely. I will post the message again in the SWING-forum and try to use the correct formatting.
Patrick.