Problem using flip view in windows10 app

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VB

Windows

Win10

helo, I am trying to add some images in flip view in windows10 app (VB.NET). the code works successfully but it does not show the image in flipview but only caption on the top left corner on flipview,
what I am missing. code is here

Dim napathme As String = String.Format("d:\pics\a.JPG")
Dim uri As Uri = New Uri(Path)
Dim img As BitmapImage = New BitmapImage(uri)
fp.Items.Add(img)

thanks in advance.

What I have tried:

I have tried lot of search for vb.net to resolve the problem, but still not....