the error is specific to the settings for the connection to the testing server in your site definition.
Make sure that the URL PRefix is a proper web address to your site.
see the "Defining a Dynamic Site in Dreamweaver" tutorial on our learning resources page:
tutorials.php
the database connections are ok everything should work i still cannot get to database tables ive done this thousands of times befor nothing has changed i have db forge studio which is connected with same information and that works fine