Thank you very much for your explanation.
I've followed exactly your instructions, but when I try
to connect to the database the error message still
appears: Problem connecting to database: No suitable driver.
The DatabaseUtils.props file and the Driver jar file I've put in the same local where weka.jar is located.
The CLASSPATH variable I've set to include the name of the jar Driver file.
I'm using java version "1.3.1_01", and maybe the driver I'm using is wrong.