Configuration of type4 drivers - NoClassDefFounException

Question

I having problems configuiring mySQL type4 driver com.caucho.jdbc.mysql.Driver ...
NoClassDefFoundException is being thrown..
java.lang.NoClassDefFoundError: com/caucho/vfs/LogStream
at com.caucho.jdbc.mysql.Driver.<clinit>(Driver.java)
extracted the jar and set the classpath to the driver classes.
d:\java1.4\caucho.jar;d:\java1.4\com\caucho\jdbc\mysql\Driver.class;
here is my piece of code
try
     String sql=null;
     Driver driver=null;
     String lastErr;
     System.out.println("1");
     //String url ="jdbc:mysql-caucho://210.212.209.100:3306/db1&user=username&password=password";
     String url ="jdbc:mysql-caucho://210.212.209.100:3306/db1";
     driver = (Driver) Class.forName("com.caucho.jdbc.mysql.Driver").newInstance();
     System.out.println("2");
     try
          //Connection con = driver.connect(url, new Properties());
          Connection con = DriverManager.getConnection(url, "username", "password");
          System.out.println("3");
          int intc = 0;
          while(size != 0)
               try
                    // Code goes here
               catch (SQLException sqle){sqle.printStackTrace();}
               catch (FileNotFoundException fnfe){fnfe.printStackTrace();}
               catch (IOException ioe){ioe.printStackTrace();}
               catch (Exception e){e.printStackTrace();}
          }//end of while
     catch(SQLException ex){System.out.println(ex);lblmessage.setText(" Files not Uploaded ");}
catch(ClassNotFoundException cnfe){cnfe.printStackTrace();}
catch(InstantiationException ie){ie.printStackTrace();}
catch(IllegalAccessException iae){iae.printStackTrace();}
where i went wrong..pl help me
Thanks and regds
Gautam

Answer 1

d:\java1.4\caucho.jar;d:\java1.4\com\caucho\jdbc\mysql\Driver.classDon't know about the first part, but the second part is useless. If you extracted the jar to the java dir then the class path would be
d:\java1.4
This is because you set the classpath to the root of the package tree.