New to Dreamweaver but the issue seems simple enough
I get the error user name/ pass incorrect. Its not. and I have tried three different hosts, three different accounts with distinct user /passwords.
I have all the dialog boxes filled out correctly for putting the site.
You may also see this if the FTP host is not properly configured in the account setup.
I know, there are three ways I can set mine up, and if each isn't exactly right, it says the username/password is incorrect, even though it isn't.
The username and password are for the exact server info for your ftp. Double and triple check to see that you have it entered exactly right according to the hosting service.