After update my projecto to version 6.5.5 the connection to database fails.
[15:38:00.813] Connection failed
The TCP/IP connection to the host 192.168.1.6, port 1433 has failed. Error: “Connection refused: no further information. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.”."
In version 6.4.5 the same configuration works fine.