Hmmm, actually, NO, I have no idea. Even when I go to your Flickr page, I have the appropriate options. When I right click, I have 17 options...lol. Are you attempting to right click on a thumbnail? You should have options to view small, medium and large images. Click to view large image and then try right clicking ON that image. Make sure that your mouse is actually on the image, before attempting to right click.
Oh wait, are you using a Mac? I'm totally unfamiliar with Mac, but have heard that the "right click" option isn't available, on Macs.
Read through this link, and see if it helps at all.
http://www.flickr.com/help/photos/#2265887
If you've turned off the "Share This" option, it will limit your right click options.
One other thought...
Depending on your "privacy" settings, you may need to be signed into your account, before it'll allow you access to Image Location. I just signed out of my Flickr account and my "right click" options were much more limited, than when I'm signed in.