The delivery message for the message is null

I'm using the SMTP library JSMPP

to send SMS-messages to mobile phones, which operate successfully, but deliverSm.getShortMessage()

and deliverSm.getShortMessageAsDeliveryReceipt

are NULL, then there is I can not get deliveryReceipt

.

The connection is established as TRX

. I set up my registered shipping as follows:

RegisteredDelivery registeredDelivery = new RegisteredDelivery();
registeredDelivery.setSMSCDeliveryReceipt(SMSCDeliveryReceipt.SUCCESS_FAILURE);
registeredDelivery.setSMEOriginatedAcknowledgement(SMEOriginatedAcknowledgement.DELIVERY_MANUAL);

      

        
        
        
      

    

and i also get deliver_sm.getemsclass

like 4

.

I would appreciate it if someone could help me because I have been stuck for a long time. Thank!