Seems like this should be the easy part, but I can't seem to get this going. My `created` and `updated` fields are not being populated. I've tried renaming the fields to something different, but no go. Other than the schema and setting up the class (very basic) as below, am I missing something?

Codeigniter v2.1.2
Datamapper ORM v1.8.2.1

Schema:

```
CREATE TABLE `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `username` varchar(255) NOT NULL,
  `password` varchar(255) NOT NULL,
  `created` datetime NOT NULL,
  `updated` datetime NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=latin1

```

User Class:

```
<?php

class User extends DataMapper
{

    function User()
    {
        parent::DataMapper();
    }

}

```