Do you have a testing server defined? Basically, DW will upload a few files to your testing server so it can determine if the db connection is working. If your testing server is not setup correctly, that is likely the issue.
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.