First thing to check is that you have php installed on your server. If you're unsure of this, please contact your server administrator to ask about this.
Next you will have to change your site to a PHP site in Dreamweaver. You can do this by editing the site definition. Go to Site->Manage Sites and then either select the one you want to edit and hit edit or create a new site. After this change to Advanced view and set up the local info the way you would for your old site. Click on the testing server and select PHP MySQL for your Server Model.
Then you would create a new php page and run through the pro maps wizard to set up the map. After setting up the page, you will have to view it in a browser so that the cache file will be generated.