Please make sure that the TCP/IP port is enabled for the SQL server. And try connecting with MS Sql management studio. If it is successful, then while giving the DB details in Chargeback installer screen, don't give any port which is optional.
the SQL Server is running on TCP Port 1433 static. No instance.
I can connect with studio and self created odbc connection.
But not with chargeback. I dont configure any port in the db connection properties of chargeback.