Problème servlet d'Authentification

Bonjour a tous,
je suis entrain de développer ma 1ère application en servlets/jsp donc j'ai rencontré un problème dans l'authentification des utilisateurs toute aide sera la bienvenue. Merci d'avance

Ma page d'authentification:

Code:

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Security Policy</title>
<link href="main.css" rel="stylesheet" type="text/css" />
<script>
function ins()
{
if(document.form1.password.value.length==0|| document.form1.login.value.length==0)
alert("must complete all mandatory fields");
else
{
document.form1.action='Servlet_Authen.java';
//document.form1.submit();
}
}
</script>
<style type="text/css">
<!--
.momo {
        font-family: Times New Roman, Times, serif;
}
.momo {
        color: #000;
        font-weight: bold;
}
.momo {
        font-size: large;
}
-->
</style>
</head>
 
<body onload="MM_preloadImages('images/genilogo.bmp')">
<p align="center" class="titre">Welcome</p>
<div align="justify">
  <p class="momo" style="size:20px">You should sign in to configure your Security Policy
  </p><form method="get" name="form1" id="form1">
  <center>
    <table width="594" border="0">
      <tr>
        <div class="ins">
          <td class="ins">*Login</td>
          <td class="ins"><input class="champtext" name="login" type="text" maxlength="30" /></td>
        </div>
      </tr>
      <tr  class="ins">
        <p>&nbsp;</p>
        <div class="ins">
          <td>*Password</td>
          <td> <input class="champtext" name="password" type="password" maxlength="30"/> </td>
        </div>
 
      </tr>
    </table>
  </center>
  <center>
    <p>
      <input name="Reset"  id="search_btn" type="reset" value="Reset" />&nbsp;&nbsp;
      <input name="Enter"  id="search_btn" type="submit" onclick="ins();" value="Enter" />
    </p>
  </center>
</form>
<p>&nbsp;</p>
<p class="momo">&nbsp;</p>
</div>
</body>

ma servlet

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//package Servlets;
 
 
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.IOException;
 
import java.sql.*;
 
public class Servlet_Authen extends HttpServlet {
 
            public class Authentification {
            private Connection c;
            private Statement stmt;
 
            public Authentification()throws ClassNotFoundException, SQLException
            {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
                c = DriverManager.getConnection("jdbc:odbc:DBAdmin");
                stmt = c.createStatement();
            }
            public boolean verification(String login,String password)throws SQLException
            {
                ResultSet rs1 =  stmt.executeQuery("select * from DBAdmin.administrateur");
                boolean verif=false;
                while(rs1.next())
                {
                    if((login.equals(rs1.getString(2)))& (password.equals(rs1.getString(3))))
                    {
                     verif= true;
                    }
 
            //System.out.println(rs1.getString(2));
            }
 
              return verif;
            }
            public void liste() throws SQLException
             {
                ResultSet rs =  stmt.executeQuery("select * from DBAdmin.administrateur");
                while(rs.next()){
                System.out.println(rs.getString(3));}
             }
            }
 
    public void doGet( HttpServletRequest req, HttpServletResponse response)
        throws ServletException, IOException {
// get stream to output HTML on!
    response. setContentType("text/html");
    PrintWriter out = response. getWriter();
 
        String login = req. getParameter("login");
	String password = req. getParameter("password");
      //  System.out.println(login+password);
 	HttpSession session = req.getSession(true);
	session.setAttribute("login", login);
 
       try{
     Authentification authentification = new Authentification();
     if (authentification.verification(login,password))
     {
 RequestDispatcher dispat = getServletContext().getRequestDispatcher("/Accueil_auth.html");
 dispat.forward(req,response);
     }
     else {
 
     }
       }
 
catch(Exception e){
 
 e.printStackTrace();
 
    }
}
}