Elena's suggestion will work. Just make sure you close OE and open it before you try the attachments again. It won't work until you restart OE.

"You need me. You wouldn't be much of a hero without a villain. And you do love being the hero, don't you. The cheering children, the swooning women, you love it so much, it's made you my most reliable accomplice." -- Lex Luthor to Superman, Question Authority, Justice League Unlimited