this error is an issue with the Dreamweaver site settings for connecting to the testing server.
make sure you have the correct settings for connecting to the testing server in your site definition.
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.