my .jar didn't run well

[aditya kusumo]

hi guys, i've made an application. My aplication run well in KToolbar n i've make .jar succesfully. But I have problem if i want to run my .jar in "Run MIDP Application...". It just display the splash screen and didn't enter the main menu. I've wait until 10 minutes and it didn't display anything. What happen with my application? This is part of my code. Thanx 4 ur help
#############KendaliAC.java (main) ##################

  
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.IOException;

public class KendaliAC extends MIDlet
{
private final CurrentLayar currentLayar;

public KendaliAC()
{
currentLayar = new CurrentLayar(this);
}
public void startApp()
{
Displayable current = Display.getDisplay(this).getCurrent();
if (current == null)
{
Alert splashScreen = new Alert(null, "Kendali AC Jarak Jauh",null,AlertType.INFO);
splashScreen.setTimeout(300);
System.out.println("mau masuk");
Display.getDisplay(this).setCurrent(splashScreen, currentLayar);
}
else
{
Display.getDisplay(this).setCurrent(current);
}
}

public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}

public void quit()
{
destroyApp(false);
notifyDestroyed();
}

private Image createImage(String filename)
{
Image image = null;
try
{
image = Image.createImage(filename);
}
catch (IOException e)
{
//null
}
return image;
}

public void about()
{
About aboutMid = new About(this);
Display.getDisplay(this).setCurrent(aboutMid);
}
public void help()
{
Help helpMid = new Help(this);
Display.getDisplay(this).setCurrent(helpMid);
}
public void setIP()
{
settingIP setting = new settingIP(this);
Display.getDisplay(this).setCurrent(setting);
}
public void showStatus()
{
status Status= new status(this);
Display.getDisplay(this).setCurrent(Status);
}
public void backMenu()
{
Display.getDisplay(this).setCurrent(currentLayar);
}
}

################currentLayar.java################

  
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.IOException;
class CurrentLayar extends Form implements CommandListener
{
       private startStudy midlet;
       // deklarasi tombol
       private Command infoCommand;
       private Command aboutCommand;
       private Command memberCommand;
       private Command helpCommand;
       private Command notmemberCommand;
       private Command kembaliCommand;
       private Command keluarCommand;
        
       private StringItem teks;
       private Ticker x = new Ticker("Selamat Datang di Pemesanan Tiket Kapal Laut via Ponsel");
       CurrentLayar(startStudy midlet)
       {
               super("");
               this.midlet = midlet;
               try {
               Image gbr = Image.createImage("/logo.png");
               append(gbr);
               aboutCommand = new Command("About", Command.OK, 2);
       infoCommand = new Command("Jadwal Kapal", Command.SCREEN, 3);
               memberCommand = new Command("Member", Command.SCREEN,4);
               notmemberCommand = new Command("Non Member", Command.SCREEN,5);
               helpCommand = new Command("Help", Command.SCREEN,6);
               keluarCommand = new Command("Keluar", Command.EXIT,1);
               addCommand(keluarCommand);
               addCommand(infoCommand);
               addCommand(aboutCommand);
               addCommand(memberCommand);
               addCommand(notmemberCommand);
               addCommand(helpCommand);
               setCommandListener(this);
               setTicker(x);
               }catch(IOException e){
               }
       }
       public void commandAction(Command c, Displayable d)
       {
               if (c == notmemberCommand )
               {
                      midlet.notmember();
               }
               if (c == keluarCommand)
               {
                      keluar();
               }
               
               if (c == memberCommand)
               {
                      midlet.member();
               }
               if (c == helpCommand)
               {
                      midlet.help();
               }
               if (c == aboutCommand)
               {
                      midlet.about();  
               }
       if (c == infoCommand)
               {
                      midlet.infoKpl();
               }
       }
       private void tampilkan()
       {
               midlet.errorLayar("Ini tampilan messagenya");
       }
       private void keluar()
       {
               midlet.layarKeluar();
       }
}