Error Code 400 When Creating Button For MapPoint

I am creating an excel file that has 2 buttons:

-1 that allows the user to select an image (works)
-1 that allows the user to select a MapPoint Map file (error 400)

The code below should be able to detail the problem.

Sub InsertImageOne()

Range("b5").Select
Application. ScreenUpdating = False

Picture1 = Application. GetOpenFilename("Picture,*.JPG,Picture,*.JPEG,Picture,*.GIF,Picture,*.BMP")

ActiveSheet.Pictures.Insert(Picture1).Select
Selection.ShapeRange.LockAspectRatio = False
Selection.ShapeRange.Height = 205
Selection.ShapeRange.Width = 344
Application.ScreenUpdating = True

End Sub