What do you mean it's not working? Be more specific, "it's not working" could mean quite a few things. There is an error on build, you get an exception when running, or it doesn't do anything. If it just doesn't do anything, you might want to try DragEnter, DragLeave, or DragOver events. Maybe those better suit your needs.
I'm going to become rich when I create a device that allows me to punch people in the face over the internet. "If an Indian asked a programming question in the forest, would it still be urgent?" - John Simmons / outlaw programmer