Seems pretty self explanatory, your screenshot says "unknown server host ...".
Specify just the hostname alone and not the sQlseRveR instance as well.
Then click on the database drop-down.
is not working.
Even with only server name or instance name the error is the same.
To recover all database name is needed the sql server instance but is not working and I don't understand why.
Please any help?
you should be using jTDS 1.3.1 not 1.2
but try the network address vs name instead
even with jdts 1.3.1 same error.
I tried with windows auth and sql server auth.
I tried with host name and network address.
but the same error is present.
can you ping the machine/ip successfully?
Have you tried basic stuff like pinging the sqlserver server?
(Like your handle btw - 0Dracula... SOTN fan?)
not sure what to check next except for maybe your sql server login logs and security settings to make sure that's not rejecting/preventing the request, or maybe even your firewalls
simply the port number was another and not default port.