Pen Tool to crop on JPG images is not working
I am trying to make a torn effect on a photo. I have used the pen tool to create a torn path on shapes in Illustrator, and from there I got to object>path>divide object below so I get two halves of a "torn" shape. This always works on shapes I create in Illustrator, but for some reason it will not divide an actual JPG.
What am I doing wrong? Is there something special I have to do to JPG's?
I have tried restarting the program, using a different computer, and replacing the photo.
