I've created Pop-Up menus using Dreamweaver MX without any problems for a long time. But suddenly, when I use the Behaviors menu, etc., the Pop-Up menus just won't show up - locally or on the web. An mm_menu.js file is created. Everything seems fine, but it won't even preview the Pop-Up menu. I'm checking the code against others that I've done successfully, and I can't find the difference.
