validation for the password field is set to a a minimum of 6 characters
your password is only 4 characters long, so validation is failing for it.
edit the server validation behavior to change the length requirements.
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.