?
That error message is coming directly from your remote SQL Server, and it can mean several different things:
wrong password is specified for sql_tg_proget on that server
the tg_proget database does not exist on that server
the sql_tg_proget user does not have access to tg_proget on that server
SQL Authentication is disabled on that server, or another setting is preventing the application from logging in to the database using that name/password; for security purposes, SQL Server does not log these reasons to the client
In this situation, your connection string needs to be modified to either point to the correct server, and/or use the correct username, password, and database, or the sql server needs to be configured to permit that connection string.
There is no other configuration required (or even possible) on the application side to connect to the database. Only the connection string.