No worries. Did a message in Dreamweaver say that? It may be that you just need to set up your site definition to work with your testing server (which connected successfully to mySql in Workbench).
I wrote some directions for someone else at: showpost.php?p=63010&postcount=12
The last section 'Setting up your Dynamic Site in DreamWeaver' would help with that process. Check that your site's files and folders are in a folder inside your c:\inetpub\wwwroot\ folder i.e. - c:\inetpub\wwwroot\mynewsite\ and follow that section I linked to.
We 'll take it from there. If still no joy, It might be easier to switch off IIS and download and install XAMPP.