TFTP Client service stops at Block#24 about netxduo HOT 2 CLOSED

VOID tftp_send(UCHAR *data_ptr, UINT data_size)
{
NX_PACKET   *my_packet;
UINT        status;
UINT        packet_length;
ULONG       i;


    /* Loop to send the data.  */
    send_data_length = 0;
    while(send_data_length < data_size)
    {

        /* Allocate a TFTP packet.  */
        status =  nx_tftp_client_packet_allocate(&client_pool, &my_packet, NX_IP_PERIODIC_RATE);
        /* Check status.  */
        if (status)
        {
            printf("ERROR");
            break;
        }

        /* Write ABCs into the packet payload!  */
        if (send_data_length + 512 < data_size)
            packet_length = 512;
        else
            packet_length = data_size - send_data_length;
                                      
        /* Write ABCs into the packet payload!  */
        status = nx_packet_data_append(my_packet, buffer + send_data_length, packet_length, &client_pool, NX_IP_PERIODIC_RATE);

        /* Check status.  */
        if (status)
        {
            printf("ERROR");
            nx_packet_release(my_packet);
            break;
        }

        /* Write this packet to the file via TFTP.  */
        status =  nx_tftp_client_file_write(&client, my_packet, NX_IP_PERIODIC_RATE);

        /* Check status.  */
        if (status)
        {
            printf("ERROR");
            break;
        }

        send_data_length += packet_length;
    }
}