I'm having a problem accessing a user account in mySQL.

I am accessing my mySql database from jdbc's DriverManager.getConnection on
another computer. jdbc successfully authenticates user: root password: null.

Then I: - added a user, 'tm' , to the user table with host '%'. no password - added a row to the db table with user tm enabling all the privilidges

Then jdbc gets an error from message from server: "Access denied for user: '@%'
to database 'tm'"

I'd like to have user 'tm' access the database 'tm' . How should I configure
mySQL for this?

Thanks