Splunk DB Connect Connection is invalid

Hello everyone, I am trying to configure a connection for MSSQL version 2008, however the DB connect message is Connection is invalid / (No detail). I have already tested the account and it works in SQL Express, since splunk I have open the port by telnet. Splunk version: 7.3.3 Splunk DB Connect: 3.1.4 (I have tried with 3.3.1) Driver: sqljdbc_4.2 and sqljdbc_7.2 Thanks for your help