make sure that the the authenticate user server behavior is not set to redirect to another page, most likely the email is not being sent because the authenticate user behavior redirects after login .
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.