How to load image with imgcrop:ImageCropView?

I am trying to upload image using the DLToolkit.Forms.Controls.ImageCropView , but it is not load nothing

Code:

   <imgcrop:ImageCropView
                       WidthRequest="100" HeightRequest="100"  x:Name="cropView" Source="http://photos2.insidercdn.com/iphone4scamera-111004-full.JPG">
     </imgcrop:ImageCropView>