Hebrew characters turned garbage

//Convert iCalendar to MapiCalendar

String appFileName = "89.ics";

Appointment app = Appointment.load(appFileName);

MailMessage msg = new MailMessage();

msg.addAlternateView(app.requestApointment());

MapiMessage mapi = MapiMessage.fromMailMessage(msg);

MapiCalendar calendar = (MapiCalendar)mapi.toMapiMessageItem();

The appointment in outlook looks with ?????? instead of characters.

Please see attached file and advise.

Thanks