C# .net application openfile Dialog works in win xp not in win 7 (32 bit or 64 bit)
<pre><code>public void spawnVr_Monthly() {
    vrMonthlyProcessingThread = new Thread(new ThreadStart(process_Vr_Monthly_File));
    vrMonthlyProcessingThread.Start();
}
public void process_Vr_Monthly_File() {
     OpenFileDialog vrmpf = new OpenFileDialog();
     vrmpf.AutoUpgradeEnabled = true;
     vrmpf.Title = "Select VR Monthly Parking file to process";
     vrmpf.Filter = "VR Monthly Parking File (VRMTHY_OUT*.TXT|*.TXT";
 }
</code></pre>
