New Content type not showing title field in admin section

Hi All,

function module_node_info() {

$items['module_writing'] = array(
'name' => t('Test Content'),
'type' => 'test_writing',
'base' => 'node_content',
'description' => t('Writers18 Writing.'),
'has_title' => '1',
'title_label' => t('Writing Title'),
'help' => t('Please fill in all fields.'),
);
return $items;
}

The above code working and showing title in admin section but if I change to base => test_writing it stops title field in admin section to add title to custom content type.

Thanks,
Rakesh