my first guess would be a pathing issue.
the file that contains the email message is not in the same place as the file you applied UE to, so the include path will need to be adjusted.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.