Trying to put together a quick test of Hibernate - working w/ latest version of Hibernate and Mysql 3.23.54 max

I have the following code and all is fine until I hit the flush(). When it's executed, I get the following exception:
*******
cirrus.hibernate.HibernateException: identifier of an instance of mtmdemo.Permission altered from 1 to 1.0
at cirrus.hibernate.impl.SessionImpl.flushEntities(SessionImpl.java:1724)
******
In the object (Permission) & database, the id field is identified as a double.. here is the code that is executed..

Thanks in advance! - PJ

*&*&*&* Code follows *&*&*&*

Transaction tx = null; // Transaction variable to hold our transaction
Datastore ds = Hibernate.createDatastore();

ds.storeClass(Permission.class).storeClass(User.class);
Session session = ds.buildSessionFactory().openSession();
tx = session.beginTransaction();

// Create and store a permission to create users:
Permission permission = new Permission();
permission.setName("user_add");
Long addID = (Long) session.save(permission);

// Create and store a permission to modify users:
permission = new Permission();
permission.setName("user_modify");
session.save(permission);

// Create and store a permission to delete users:
permission = new Permission();
permission.setName("user_delete");
Long delID = (Long) session.save(permission);

// Create a user and add give him some permissions:
User user = new User();
user.setName("Some User");
// Load the "add user" permission and give it to the user:
permission = (Permission) session.load(Permission.class, addID);
user.addPermission(permission);
permission.addUser(user); // associate the user with the permission as well
// Load the "delete user" permission and give it to the same user:
permission = (Permission) session.load(Permission.class, delID);
user.addPermission(permission);
permission.addUser(user);

// Store the user
session.save(user);
// Flush pending object inserts/deletes/updates:
session.flush();

tx.commit(); // Commit the transaction (if we got this far)
*&*&*&*& end of code *&*&*&*&


<hibernate-mapping>
<class name="mtmdemo.Permission" table="permissions">
<id name="ID" type="long" column="permissionid">
<generator class="native"/>
</id>
<property name="name" column="permissionname"/>
<set role="users" table="userpermissions" readonly="true" lazy="true">
<key column="permissionid"/>
<many-to-many class="mtmdemo.User" column="userid"/>
</set>
</class>
</hibernate-mapping>

Are you sure, you are using the latest version of Hibernate? I think cirrus.hibernate.HibernateExpection is thrown by Hibernate 1.x. Since Hibernate 2.x I had expected a net.sf.hibernate.HibernateException!?!

What a bonehead.. I was using an old jar file. - thanks