Create SQL Server user with SQL Server Authentification
Hope these links help to fix your problem --- 

https://stackoverflow.com/questions/6643720/add-login-and-connect-to-sql-with-sql-server-authentication

https://movabletype.org/documentation/mt5/advanced/creating-a-sql-server-database-2.html

The message you are receiving basically means "I can't connect to SQL Server". It can be due to a number of issues:  


The SQL Server service is not running 
The SQL Server instance is not
configured to use TCP/IP to communicate


The database is using windows authentication and the user is not authorized orThe database is using mixed-mode authentication and the user/pass is incorrect  As for the usernames you are given, I would assume that the "administrator" username is local windows administrator of the machine SQL server is running on, and that the "sa" user is the default database administrator, that is installed when setting SQL Server to use mixed-mode authentication.  So, I would recommend to try connecting to the database using Mixed-mode authentication, with the  "sa" username the "anotherpassword" password.