Add event to calendar not working

Question

I tried to add the event to the calendar using the code below. It works fine with all devices except Nexus 6 (OS 6.0.1). Its Log mapping is similar to added event: content://com.android.calendar/events/1598in Logcat. But this event does not appear on my calendar.

the code:

private void addEvents() {
        ContentValues values = new ContentValues();
        values.put("calendar_id", 1);
        values.put("title", "event Name");
        values.put("allDay", 0);
        values.put("dtstart", myCalendar.getTimeInMillis() + 11*60*1000); // event starts at 11 minutes from now
        values.put("dtend", myCalendar.getTimeInMillis()+60*60*1000); // ends 60 minutes from now
        values.put("description", "event desc");
        values.put("hasAlarm", 1);
        values.put(CalendarContract.Events.EVENT_TIMEZONE,TimeZone.getDefault().getID());
        ContentResolver resolver=getApplicationContext().getContentResolver();

        Uri event = resolver.insert(CalendarContract.Events.CONTENT_URI, values);

        Log.d("added event",event.toString());
    }