Newbie ashahid

How do I configure properties of database connections defined in RapidMiner Studio

Hi, I'm a newbie and I don't have much knowledge of server and networking... I'm using rapidminer 7.1 and need to use read database for my project but cannot configure it. I just followed this video tuotrial https://www.youtube.com/watch?v=Dig0A1oC3Z0 in which he copied JTDS files but when I test it using those commands, it gives me back an error present in Screenshot saying "Network error IOException: Conncetion refused: connect" 

Where am i wrong?

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