I am trying to see if I can be using the Embedded Database that is, JavaDB in NetBeans to develop my Java Desktop Applications.

I can create my database and tables in the embedded JavaDB. I can even write my codes for the Program Application. The Problem I face is when I run the Application I receive this message: "Schema ROOT does not exist". The ROOT in the message is the UserName or UserID I supplied when setting up or creating the Database.

Please, please, help me out.
Sometimes I try another method and I get the following message: "Connected Database does not contain tables". This message is not true because I have created my database and table in the embedded

Please help me out or direct me to where I can get a good tutorial on the solution to this problem.
Thank you.