Make sure your picture is in JPG, GIF, BMP, or PNG format. Otherwise, it will be added as a file attachment without being displayed on the page
Make sure the width of the image is not greater than 600 pixels.
Many of the same rules apply to avatars as when uploading a picture to share here :wink: :D:D:D
http://www.quiltingboard.com/t-429-1.htm
Also if the site offers different urls to use, choose the url specifically for forums. Ex: the emoticons that some of us have in our signature areas... there are several different urls available, but only the ones marked "forum" will work properly here :D:D:D