Here is how to post an avatar, the photo under your name:
1. Click on My Controls located at the top of all SM pages.
2. You will then see a page with a listing of choices on the left. Look at the Personal Profile section, the fourth category.
3. Cick on Edit Avatar Settings under the Personal Profile category.
4. Now you're on the page you'll need to add your photo. Go to the last selection: Upload a new image from your computer
5. Click on Browse and you will see your computer files. Find the photo you want from your computer and click on it and then click Update Avatar. You may need to hit "Refresh" to see the new avatar.