database application problem with jtable binding

[rado lutov]

Hi i have a bit of trouble understanding the creation of a database application using netbeans and i hope someone could clear things up a little for me. I created 2 tables using sql named "staff" and "cars"(just random) and each has few attributes. What i would like to do is create an application where i can add,edit,delete staff and cars but do that on separate forms. I did a tutorial on netbeans where these 2 things were done on the same form (it had 2 jtables on the first page of the application). I want to separate this so in one jdialog i have staff jtable and i have a second jdialog which contains jtable about the cars. I tried to put a button on the first jdialog (the one created from the wizard when i created the project)which when clicked will open the second jdialog and it works until i bind my jtable on the second jdialog ( i bind it by clicking on the Import Data to Form and then selecting my database and the table).

 package desktopapplication4;

import org.jdesktop.application.Application;
import org.jdesktop.application.SingleFrameApplication;

public class DesktopApplication4 extends SingleFrameApplication {

@Override protected void startup() {
        show(new DesktopApplication4View(this));
    }

 @Override protected void configureWindow(java.awt.Window root) {
    }

public static DesktopApplication4 getApplication() {
        return Application.getInstance(DesktopApplication4.class);
    }

public static void main(String[] args) {
        launch(DesktopApplication4.class, args);
    }
}
   

this is the generated code which opens the first jpanel. Does anyone have any idea what am i doing wrong in the biding process as this seems to be the problem?
The error i get when i click on the button that should display the second jdialog is

Exception in thread "AWT-EventQueue-0" java.lang.Error: java.lang.reflect.InvocationTargetException
at org.jdesktop.application.ApplicationAction.actionFailed(ApplicationAction.java:859)
at org.jdesktop.application.ApplicationAction.noProxyActionPerformed(ApplicationAction.java:665)
at org.jdesktop.application.ApplicationAction.actionPerformed(ApplicationAction.java:698)


Thanks in advance and sorry if im completely on the wrong track