Hi there Ming,
The result I get is still the same.

Connection Parameters:
User = root
Password = ********
Driver = com.mysql.jdbc.Driver
Url = jdbc:mysql://localhost:3306/mysql?zeroDateTimeBehavior=convertToNull
Message: Access denied for user 'root'@'localhost' (using password: NO)
SQLState: 28000
ErrorCode: 1045
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Database Connection Test Failed.
Please correct the errors before running KonaKart.
You can find help in the KonaKart FAQs and in the KonaKart Forum.
Do you have any clues on where could I have gone wrong?
I merely, pressed the next button during the installation and have never changed anything only for the database name.
Thank you very much for your help!