Member Rara Avis
You're half-way there, Joy. You do go to the Member's Area, but you do NOT go into your Profile. The URL displayed there (as well as that entire section of your Profile) is read-only and any changes you make will just be thrown away.
Instead, go into the Member's Area and look below the Profile link, for one that says "Upload Your Photo." The image file has to exist on your hard disk first, then you can upload it to our web server. Be sure to read all the directions, though, because there are limitations involved.