APM Plugin MSSQL Server Network error IOException: Could not create socket

APM Plugin MSSQL Server Network error IOException: Could not create socket

Hi, 

could you help me with this message. The database monitor was working good. But days ago send the message:

MSSQL Server is down.
SQL Error : Network error IOException: Could not create socket




I edit the monitor and test the credential.



I checked the communication and it passed. Ping and Telnet.





I checked if the port change but it did not. 



On the monitoring server I do test with sqldeveloper and it pass. 



Thanks & Regards!

A.