StringFormat.GenericTypographic is working fine in x86, Not working in x64

Hi

My code is here to print string value in PrintPreviewDialog window

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Printing;

namespace TemplatePrintPreview
{
    public partial class Form1 : Form
    {
        private PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog();
        private PrintDocument printDocument1 = new PrintDocument();

        public Form1()
        {
            InitializeComponent();
        }

        private void pd_PrintPage(object sender, PrintPageEventArgs e)
        {
            StringFormat fieldStringFormat = new StringFormat(StringFormat.GenericTypographic);
            fieldStringFormat.Alignment = StringAlignment.Far;
            e.Graphics.DrawString("'StringFormat.GenericTypographic' is working fine in x86, Not working in x64", new Font("arial", 12), Brushes.Red, new RectangleF(900, 300, -200, 20), fieldStringFormat);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            printDocument1.PrintPage += new PrintPageEventHandler(pd_PrintPage);
            printPreviewDialog1.Document = printDocument1;
            printPreviewDialog1.ShowDialog();
            this.Close();
        }
    }
}

When the application is run under Platorm traget 'x86' or 'any cpu' it is printing string field in PrintPreview window, but when i set Platform target to 'x64' (Project Properties->Build->Platform target) it does not print any thing in PrintPreview window.

I am working on VS2012 IDE, 4.5 .net Framework, Windows 7 Professional SP1 64 bit OS.

Thanks,

Kota.