After you take a screen shot, where do you find it? Is it in AH films? Once you locate it can you cut and paste to the BBS?
It's in the "screenshots" sub folder of your Aces High folder.
You can attach pictures to your posts in a few selected AH forum boards (for example "Film & Screenshots" or "Bug Reports") - to do that, click on "additional options" when composing the message. To directly show them in your posts you have to upload them to a picture hoster (for example photobucket.com) and then inster the links here.