"ID": invalid identifier in hibernate application

I developed a standalone  hibernate application using hibernate3.2 version. when i run the application i'm getting the following error.i attached all the source files.

 java.sql.BatchUpdateException: ORA-00904: "ID": invalid identifier
Any solution?

regards
rani

MyContact.java
---------------
package com.surya.hibernate;

public class MyContact {
	
	  private String firstName;
	  private String lastName;
	  private String email;
	  private long id;
	  
	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 getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public long getId() {
		return id;
	}
	public void setId(long id) {
		this.id = id;
	}

	  
	  
}

=============================================
FirstExample .java

package com.surya.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class FirstExample {
  public static void main(String[] args) {
    Session session = null;

    try{
      // This step will read hibernate.cfg.xml and prepare hibernate for use
      SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
       session =sessionFactory.openSession();
        //Create new instance of Contact and set values in it by reading them from form object
         System.out.println("Inserting Record");
        MyContact contact = new MyContact();
        contact.setId(333);
        contact.setFirstName("Deepak");
        contact.setLastName("Kumar");
        contact.setEmail("deepak_38@yahoo.com");
        session.save(contact);
        System.out.println("Done");
    }catch(Exception e){
      System.out.println(e.getMessage());
    }finally{
      // Actual contact insertion will happen at this step
      session.flush();
      session.close();

      }
    
  }
}
============================
contact.hbm.xml
----------------

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Oct 5, 2010 10:14:49 AM by Hibernate Tools 3.3.0.GA -->
<hibernate-mapping>
    <class name="com.surya.hibernate.MyContact" table="MYCONTACT">
        <id name="id" type="long">
            <column name="ID" />
            <generator class="assigned" />
        </id>
        <property name="firstName" type="java.lang.String">
            <column name="FIRSTNAME" />
        </property>
        <property name="lastName" type="java.lang.String">
            <column name="LASTNAME" />
        </property>
        <property name="email" type="java.lang.String">
            <column name="EMAIL" />
        </property>
    </class>
</hibernate-mapping>
===========================

hibernate.cfg.xml
------------------


<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
		"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
		"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>

        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@//localhost:1521/DB1</property>
        <property name="hibernate.connection.username">scott</property>    
		<property name="hibernate.connection.password">tiger</property>     
		<property name="hibernate.connection.pool_size">10</property>    
		<property name="show_sql">true</property>
        <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property> 
		<!-- Mapping files -->
		<mapping resource="contact.hbm.xml"/>

    </session-factory>
</hibernate-configuration>

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