Crystal Report Displays Strange Characters when Exported to pdf

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C#

Windows

CrystalReports

I use Visual Studio 2005 with c# and windows forms. I managed to export crystal reports to pdf in code. But The exported pdf report has added characters. For Example it would display "Mathematics" as "Mathematcs" or
"History" as "Histtory" or "Subject" as "Subjecti"
It basically adds t to every word that has t in lower case. or appends i to it.

I have googled for any posible solution, applied crystal report 2005 hotfix. But the problem continues.

I am stuck. The sample code for export is pasted below

private void btnPrint_Click(object sender, EventArgs e)
{
  string _FileName = DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + ".pdf";

  try
  {
    ReportDocument cryRpt = new ReportDocument();
    cryRpt = (ReportDocument)crystalReportViewer1.ReportSource;
    ExportOptions exportOpts = new ExportOptions();
    exportOpts.ExportFormatType = ExportFormatType.PortableDocFormat;
    exportOpts.ExportDestinationType = ExportDestinationType.DiskFile;

    ExportOptions CrExportOptions;
    DiskFileDestinationOptions CrDiskFileDestinationOptions = new DiskFileDestinationOptions();
    PdfRtfWordFormatOptions CrFormatTypeOptions = new PdfRtfWordFormatOptions();
                
    CrDiskFileDestinationOptions.DiskFileName = ConfigurationManager.AppSettings.Get("PRINT_TEMP") + _FileName;
    CrExportOptions = cryRpt.ExportOptions;
    {
      CrExportOptions.ExportDestinationType = ExportDestinationType.DiskFile;
      CrExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat;
      CrExportOptions.DestinationOptions = CrDiskFileDestinationOptions;
      CrExportOptions.FormatOptions = CrFormatTypeOptions;
    }
    cryRpt.Export();
    System.Diagnostics.Process.Start(ConfigurationManager.AppSettings.Get("PRINT_TEMP") + _FileName);
  }
  catch(Exception Ex)
  {
    string msg = Ex.Message;
    MessageBox.Show("You Must Have a report viewable in the Report panel To print");
  }
}