im training to create a simple jsp form but im getting this exception

Java Code: 
  Name was not previously introduced as per JSP.5.3

this is the jsp code
Java Code: 
  <%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"   import="java.beans.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="‪/orderPizzaJsp/WebContent/order.jsp‬" method="post">
firstName<input type="text"   name="firstName" ><br>
lastName<input type="text"   name="firstName" ><br>
address<input type="text"   name="firstName" ><br>
phoneNum<input type="text"   name="firstName" ><br>
<br>
<input type="submit" value="Submit"> <input type="reset"  value="Reset">
</form>



<%
	if(request.getMethod().equals("post")){
		%>
		<jsp:useBean id="formHandler" type="bean.com.DataBean"  scope="session">
		<jsp:setProperty name="formHandler" property="*" />
		
		</jsp:useBean>
		
		<jsp:getProperty property="formHandler" name="firstName"/>
		<jsp:getProperty property="formHandler" name="lastName"/>
		<jsp:getProperty property="formHandler" name="address"/>
		<jsp:getProperty property="formHandler" name="phoneNum"/>
		<% 
	}	
		%>
	


</body>
</html>


and this is the bean


Java Code: 
    package bean.com;

public class DataBean {
	
	private String firstName;
	private String lastName;
	private String address;
	private int phoneNum;

	
	
	
	
	
	
	public DataBean(String firstName, String lastName, String address,
			int phoneNum) {
		super();
		this.firstName = firstName;
		this.lastName = lastName;
		this.address = address;
		this.phoneNum = phoneNum;
	}
	public String getFirstName() {
		return firstName;
	}
	public void setFirstName(String firstName) {
		this.firstName = firstName;
	}
	public String getLastName() {
		return lastName;
	}
	public void setLastName(String lastName) {
		this.lastName = lastName;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public int getPhoneNum() {
		return phoneNum;
	}
	public void setPhoneNum(int phoneNum) {
		this.phoneNum = phoneNum;
	}
	

}

thanks
miki