Odd behavior assigning Bitmaps to ImageView

[sterlingy]

I don't get any errors, but my the image doesn't change:

Sub imgViewFlashMode_Click
   Dim flashSetting As String
   
   flashSetting = imgViewFlashMode.Tag
   
   Select flashSetting
      Case "1"
         imgViewFlashMode.Bitmap = LoadBitmap(File.DirAssets,"FlashOn.png")
         imgViewFlashMode.Tag = "2"
      Case "2"
         imgViewFlashMode.Bitmap = LoadBitmap(File.DirAssets,"FlashOff.png")
         imgViewFlashMode.Tag = "3"
      Case "3"
         imgViewFlashMode.Bitmap = LoadBitmap(File.DirAssets,"FlashAuto.png")
         imgViewFlashMode.Tag = "1"
   End Select
End Sub

watching the app run in debug mode, I can see that the Tag gets updated, but the Bitmap for the ImageView doesn't seem to update.

Any thoughts?

UPDATE: PROBLEM SOLVED