On the top menu, click: "Site - New site...", and enter in "Site":
Site Name: the name you want Dreamweaver to call this website
(typically "yourdomain.ext")
Local Site Folder: Select the folder on your local disk in which your local website is being developed (for a new website, the one created in 1. above)
Select "Server" in the left menu then click on "+" and enter:
Server Name: the name you want Dreamweaver to call this server configuration
(for instance, "JSM-Hosting")
Connect using: FTP
FTP Address:
"yourdomain.ext" (or "yourIPaddress" - see here)
Username: "your-user-name" (the one you were given when opening your JSM-Hosting account - see here)
Password: "your-password" (the one you were given when opening your JSM-Hosting account - see here)