You're a basic member, so you can't upload a pic to bladeforums. You either have to 1. have the pic hosted somewhere else, and link to it, or 2. pay the $25 or whatever to become a higher-level member that gets picture uploading privileges. Doing so also helps keep bladeforums afloat.
Since you're just trying to show pics, I think becoming a premium member is enough, although the policy might be that you need a knifemaker's membership instead. Hopefully Dexter will chime in with the right answer.
IMO, it's definitely worth the effort to find out what kind of membership you need, and post pics rather than having to email them.
Joe