eCart 5 will not work on Dreamweaver CC 2014. You will have to either upgrade to eCart 6 or use a previous version of Dreamweaver.
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.