You can only use one graphic format for the images
Name the images after the kategory you define in DiscussionForumCreate. As standard only .gif images are working, because the extension is hardcoded in DiscussionForumHead and DiscussionForumOverview.
Example: You have a category named Projects the image you upload here must have the filename Projects.gif
-- AndreUlrich - 07 Jun 2003