I am getting error "SQL server connection failed"
If you've selected the SQL server as BigAnt database during the install, and still getting "SQL server connection failed" when you run BigAnt Server, please see instruction below to allow remote tcp/ip connection with SQL:
http://support.webecs.com/kb/a868/how-do-i-configure-sql-server-express-to-allow-remote-tcp-ip-connections-on-port-1433.aspx