Originally Said By: Above
Dreamweaver doesn't actually need a Remote connection to the database. It uses FTP to upload a web page to the server and connects directly through a url, so sometimes "localhost" will work in Dreamweaver when navicat requires a full domain. 
There are really only two things that need to be correct for dreamweaver to connect to your database:
Your Testing Server in dreamweaver (usually issues are with a bad Server URL)
Your Database Credentials (if it works on your live site, the credentials are correct. You can get the correct server name from the top of your phpMyAdmin page while viewing the database)
In your case you had a missing https;// in front of your testing url and the server host was set to the wrong domain. Correcting these two issues allowed dreamweaver to connect to your database.
Did this help? Tips are appreciated...
