Tracy, you are using the wrong link. When you click on your thumbnail and the next window opens you will notice that to the left there is a section called "Tools". Click on "Create link". In the next window that opens you will see a highlighted link. Right click on that highlighted link, copy it and use it for your image.
A lot of people make the mistake of right clicking on the image and using the URL that comes up in "Properties". That will not work.