The most likely cause for this is that you don't have all your files contained in the site that you are working on. Please copy all your site files to the currently opened site in Dreamweaver and try to edit the pages again and see if that works for you. The reason the behavior is editable, but none of the information is saved is because the Universal Email server behavior will look for the webassist files in the root of the current directory and those aren't found, so the behavior cannot be prepopulated.
