Application ID initialization fails J2ME

Hi there!,
I'm trying to do (simulator Nokia SDK 2.0 with In-app purchase simulation "Test with Nokia Publish Server"):
[CODE]
public static IAPClientPaymentManager getIAPManager() {
if (manager == null) {
try {
manager = IAPClientPaymentManager.getIAPClientPaymentManager();
}
catch (IAPClientPaymentException ipe) {
Log.p(ipe.getMessage());
}
}
return manager;
}
[/CODE]
But I got :confused::

"Application ID initialization fails"

Does anybody know why this happen?

Thank you a lot!
Best,
Fernando Moreno.