SaveFileDialog.ShowDialog() returns Cancel when Yes to overwrite ...

Hello -

I have the following code to detemine a file name when my application
is saving a file. The problem is that if the file already exists and
I select the Yes button in the "Do you want to replace" dialog, the
DialogResult is Cancel instead of OK. Is there something I am
missing?

Dim lSaveFileDialog As New SaveFileDialog

lSaveFileDialog.AddExtension = True
lSaveFileDialog.Filter = "PNG (*.png)|*.png"
lSaveFileDialog.InitialDirectory = lDefaultPath
lSaveFileDialog.OverwritePrompt = True
lSaveFileDialog.Title = "Save As"

Dim lDialogResult As DialogResult = lSaveFileDialog.ShowDialog()

Thanks,
Joe
.