Can't create new photo streams in Aperture
When I select new photos to add to a photo stream, I am not prompted to create a new photo stream, they are simply sent to the stock photo stream that is already shared between my iPhone and Aperture. How can I create new photo streams in Aperture if the standard method doesn't work for me? What is wrong with my setup that I can't follow the videos of instructions because I don't get a dialog box when I try to share?
Thanks,
Will
Aperture 3, Mac OS X (10.7.5)