The image has to be hosted elsewhere (e.g. photobucket, etc.) and you copy the exact image location (URL) = go to the image on photobucket, right click and you will see an option called "copy image location" and click that; then.
Here on this page, go to the little landscape (mountain) looking icon above the section of writing responses and you can paste the image URL there. You have to also make sure you give the item a quick name (line under the URL line) and you should see your image herein. Not sure why 11W makes it so tough for folks to place images, but that is how it has to be done.