The + is not active for the cart page on server behaviors and there is no ecart or general behavior listed on the check-out page
OK after rebooting the server behavior is active however I don't see any e-cart behaviors to add
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.