C# program keep on running despite no error

Am working in a project where i should give a crystal reports RPT file as input and get the properties of that report.

But am facing a problem in loading the report itself so i have used isLoaded() function to check whether the report is loaded or not.

I have used the following code.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Web;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
 namespace sampleretreival
{
    public partial class Form1 : Form
    {
        public string flName;
        public Form1()
        {
            InitializeComponent();
            Retrieve.Enabled = false;
        }
        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lstFiles.SelectedItems.Count > 0)
            {
                Retrieve.Enabled = true;
            }
            else
            {
                Retrieve.Enabled = false;
            }
        }
        private void Browse_Click(object sender, EventArgs e)
        {
            openFileDialog1 = new OpenFileDialog();
            openFileDialog1.Multiselect = false;
            openFileDialog1.Filter = "Crystal Report Files | *.rpt";
            openFileDialog1.ShowDialog();
            flName = openFileDialog1.FileName;
            if (flName.Length != 0)
            {
                lstFiles.Items.Insert(0, flName);
                Retrieve.Enabled = true;
            }
            else
            {
                MessageBox.Show("Please select the crystal report files for analysis.", "SAMPLE", MessageBoxButtons.OK, MessageBoxIcon.Information);
                Browse.Focus();
            }
          }
        private void Retrieve_Click(object sender, EventArgs e)
        {
            int a=1;
            ReportDocument rpt = new ReportDocument();
            rpt.Load(flName);
            int count = 5;
            if (rpt.IsLoaded)
            {
                MessageBox.Show(count.ToString());
            }
            else
            {
                MessageBox.Show(a.ToString());
            }
        }
         }
}

After compiling I clicked the Browse button to select the report from the disk. But when I click Retrieve button,program keep on running. Am not getting any output or any error.