I have problem trying to run this. Always I get No driver, I dont know anything else, I am using windows and for compiling I get this

D:\Asterisk-Java\test\ivr>javac -cp .\ivrlib\lib\postgresql-8.3-603.jdbc4.jar DBtest2.java
And run like this

>java DBtest2
No driver

import java.sql.*;

    class DBtest2{
    public static void main(String[] args)
    {
    String driver ="org.postgresql.Driver";
    String connectString = "jdbc:postgresql://10.10.10.10:5432/db";
    String user = "xxxx";
    String password = "qqqqq";

    try{
    Class.forName(driver);
    Connection con = DriverManager.getConnection(connectString, user , password);
    Statement stmt = con.createStatement();

    ResultSet rs = stmt.executeQuery("select f_celular from t_clientes");

    while (rs.next()){
    System.out.println("celular::" + rs.getString("f_celular"));
    }

    stmt.close();
    con.close();

    }

    catch ( Exception e ){
    System.out.println("No driver");
    System.out.println(e.getMessage());
    }
    }
    }