What version of dreamweaver are you running? You may need to install the deprecated server behaviors panel if you are running Dreamweaver CC or newer. I've attached a zipped copy you can install from.
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.