404 file not found error

Hi,
i'm using Myeclipse 5.5.1 GA
i have created a login application
and i hav written a seperate servlet file too
after clicking in submit button its showing file not found
its is not finding class file of servlet
please do reply

Thanks

Here is jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>Veeresh Gutti</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<body bgcolor="#FFFFCC"><div><blockquote><blockquote><blockquote><font size="6" color="#339966">                                        <font color="#ffff00"> </font><font color="#339966"> </font><font color="#339966"><font face="Engravers MT">BDA</font> </font></font><font color="#ffff00"><br></font><div align="left"><font color="#339966">                                        <u><font face="Engravers MT"><strong><font size="3">Bangalore Development Authority</font></strong></font></u></font></div></blockquote></blockquote></blockquote></div><div align="center"><div align="left">
</div><div style="color:#00FF00"><div align="left">
</div><div align="left">
</div><h3 align="center"><img alt="" src="banner2.jpg" width="936" height="218"></h3>

</div>
<table width="100%" height="150px" bgcolor="#339999" border= "1">
<tr><td width="50%" height="100"><font size="5" color="#99CCCC"><u><strong><font face="Arial Narrow" color="#ffff00"> WelCome To BDA</font></strong><br></u></font><br><br><p>
<font color="#ffff00">The work has been entrusted to M/s. U.P. State Bridge Corpn. Ltd.
at a contract cost of Rs. 2669.43 lakhs with the scheduled date of
completion as 30.04.2004. The main flyover is along IRR- Indiranagar 80 ft.
road with a 2-lane divided carriageway. Also 3 loops for providing free
tuning movements from Airport road to Indiranagar 80 ft. road, IRR to
Airport road and Airport road to IRR are provided. Also, 2 grade level bridges
</p> <div align="right"><font color="#0000ff"><a href="MyJsp.jsp"> Read more...</a></font></div></td>
<td bgcolor="#339999" width="35%"><font color="#ffff" size=5><font face="Arial Rounded MT Bold">
<u>Member Login</u> </font><br><br></font>
<form action="Authentication" method="post"><div align="left"><font color="#ffff">
User Name : <input type="text" name="user"> <br></div><br>
Password   : <input type="Password" name="pass"> <br> <br>

<center><input type= "submit" value="Login" size="15">
<input type= "reset" value="reset"></center>
</font></form></td></tr>
</table>

</body>
</html>

and servlet

import java.io.*;
import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Authentication extends HttpServlet{

/**
*
*/
private static final long serialVersionUID = 1L;
private ServletConfig config;

public void init(ServletConfig config)
throws ServletException{
this.config=config;
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException,IOException{

PrintWriter out = response.getWriter();
String connectionURL = "jdbc:mysql://192.168.6.49/logindetails";
Connection connection=null;
ResultSet rs;
String userName=new String("");
String passwrd=new String("");
response.setContentType("text/html");
try {
// Load the database driver
Class.forName("com.mysql.jdbc.Driver");
// Get a Connection to the database
connection = DriverManager.getConnection(connectionURL, "MySQL", "admin");
//Add the data into the database
String sql = "select name,password from loginpass";
Statement s = connection.createStatement();
s.executeQuery (sql);
rs = s.getResultSet();
while (rs.next ()){
userName=rs.getString("name");
passwrd=rs.getString("password");
}
rs.close ();
s.close ();
}catch(Exception e){
System.out.println("Exception is ;"+e);
}
if(userName.equals(request.getParameter("user")) &&
passwrd.equals(request.getParameter("pass"))){
out.println("User Authenticated");
}
else{
out.println("You are not an authentic person");
}
}
}

And i hav attached xml details
Thanku

Please provide code snippet or exception trace...

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