java to MS SQL

[ayan]

i'm new to this thing. sorry for bothers but i want to know what did i miss? i have this code throwing an exception of com.microsoft.jdbc.sqlserver.SQLServerDriver

import java.sql.*;

public class JdbcExample3{
    public static void main(String args[]){
        Connection conn=null;
        try{
            Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
            conn=DriverManager.getConnection(
                "jdbc:microsoft:sqlserver:///northwind");
            if(!conn.isClosed())
                System.out.println("sucessfully connected to sql server...");
        }
        catch(Exception e){
            System.err.println("Exception: "+e.getMessage());
        }
        finally{
            try{
                if(conn!=null) conn.close();
            }
            catch(SQLException e){}
        }
    }
} 

i installed the j2sdk1.4.0, microsoft sql server 2000 for jdbc driver and the ms sql 2000.