Same ID card but two different pictures - one scans PDF417 but other doesn't

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        private BarcodeEngine barcodeEngineInstance; // The barcode engine
        private RasterImage theImage; // The current loaded image
        private string imageFileName; // Last file name we loaded, this is used in the "Writing Barcodes" tutorial

        public Form1()
        {
            InitializeComponent();
        }
        protected override void OnLoad(EventArgs e)
        {
            // Replace the keys with unlock support string provided by LEADTOOLS, or use the evaluation kernel

            // Unlock reading 1D barcodes
            string MY_LICENSE_FILE = @"eval-license-files.lic";
            string MY_DEVELOPER_KEY = @"xxx";
            RasterSupport.SetLicense(MY_LICENSE_FILE, MY_DEVELOPER_KEY);

            // Create the BarcodeEngine instance
            barcodeEngineInstance = new BarcodeEngine();
            base.OnLoad(e);
        }
        protected override void OnFormClosed(FormClosedEventArgs e)
        {
            // Delete our resources

            if (theImage != null)
            {
                theImage.Dispose();
            }

            base.OnFormClosed(e);
        }

        private void loadImageButton_Click(object sender, EventArgs e)
        {
            string fileName = String.Empty;

            using (OpenFileDialog dlg = new OpenFileDialog())
            {
                if (dlg.ShowDialog(this) == System.Windows.Forms.DialogResult.OK)
                {
                    fileName = dlg.FileName;
                }
                else
                {
                    return;
                }
            }

            // Load the image
            using (RasterCodecs codecs = new RasterCodecs())
            {
                RasterImage newImage = codecs.Load(fileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1);

                // Delete old image if any
                if (theImage != null)
                {
                    theImage.Dispose();
                }

                theImage = newImage;
                imageFileName = fileName;
            }
        }

        private void readBarcodesButton_Click(object sender, EventArgs e)
        {
            if (theImage == null)
            {
                MessageBox.Show("Load an image first");
                return;
            }

            try
            {
                BarcodeData healthCardData = barcodeEngineInstance.Reader.ReadBarcode(theImage, LogicalRectangle.Empty, BarcodeSymbology.PDF417);

                StringBuilder sb = new StringBuilder();


                    sb.AppendFormat("Symbology: {0}, Location: {1}, Data: {2}", healthCardData.Symbology.ToString(), healthCardData.Bounds.ToString(), healthCardData.Value);
                    sb.AppendLine();


                MessageBox.Show(sb.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}