Work from your example located here:
http://www.aspose.com/documentation/.net-components/aspose.slides-for-.net/adding-picture-frame-to-slide-1.html
I have attached and example (Issue2.aspx) that stops working/hangs on the following line.
slide.Shapes.AddPictureFrame(ShapeTypeEx.Rectangle, pix.X, pix.Y, imgx.Width, imgx.Height, imgx);
Thought on getting this to work?