Your authenticate user server behavior was set to use a connection "logontest", but the connection on the page is named "testsite". I changed that on line 25 and the login page seems to work now.
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.