Trying to connect to an Oracle db through Java, but I got this message??

Hi, I tried to connect to an Oracle database whose SID is called Aldo on 
my local machine called (server) on a WIN 2000 plattaform.

I have set the ODBC driver under Win 2000 as described on the paragraph: 
Setting up a Database page 1015 of Beginning Java2 jdk1.3 on System DSN: 
the name source data is aldo, the user name: SYSTEM, the Server: server,
but when I run the MakingAStatement.java  under JBuilder6 I got this 
message or error, why???:


C:\JBuilder6\jdk1.3.1\bin\javaw -classpath "C:\JBuilder6
\samples\Welcome\classes;C:\JBuilder6\jdk1.3.1
\demo\jfc\Java2D\Java2Demo.jar;C:\JBuilder6\jdk1.3.1
\jre\lib\i18n.jar;C:\JBuilder6\jdk1.3.1\jre\lib\jaws.jar;C:\JBuilder6
\jdk1.3.1\jre\lib\rt.jar;C:\JBuilder6\jdk1.3.1
\jre\lib\sunrsasign.jar;C:\JBuilder6\jdk1.3.1\lib\dt.jar;C:\JBuilder6
\jdk1.3.1\lib\htmlconverter.jar;C:\JBuilder6\jdk1.3.1\lib\tools.jar"  
MakingAStatement 
java.sql.SQLException: [Microsoft][ODBC driver for Oracle][Oracle]ORA-
12514: TNS:listener could not resolve SERVICE_NAME given in connect 
descriptor


the code of the java program whether you are interested in is:


import java.sql.*;
public class MakingAStatement
 {
  public static void main(String[]args)
  {
   //Load the driver 
   try
    {
     //Load the driver class
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     
     //This defines the data source for the driver
     String sourceURL=new String("jdbc:odbc:aldo");

    //Create connection through the DriveManager
    Connection databaseConnection=
                       DriverManager.getConnection(sourceURL);
   Statement statement=databaseConnection.createStatement();
   
   ResultSet authorNames= statement.executeQuery
                          ("SELECT lastname, firstname FROM authors");

   // Output the resultset data
    while(authorNames.next())
    System.out.println(authorNames.getString("lastname")+" "+
     authorNames.getString("firstname"));
    }
    catch(ClassNotFoundException cnfe)
    {
     System.err.println(cnfe);
    }
    catch(SQLException sqle);
    {
     System.err.println(sqle);
    }
   }
  }

Thanks in advance
Aldo


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