start date and end date select fields remain empty on editing a timelin view

Hello

Please help me to find why start date and end date select fields remain empty on the view settings, when I try to edit format settings.

Join here a picture of the view setting and one another for the content type manage fields.

And part of the content of files:
- poste.date.inc:

<?php
$plugin = array(
  'name' => t('Post date'),
  'callback' => 'timeline_date_source_post_date_field_conversion',
  'handler_name' => 'views_handler_field_date',
);
?>

- date.field.inc:

<?php
$plugin = array(
  'name' => t('Date field'),
  'callback' => 'timeline_date_source_date_field_conversion',
  'handler_name' => 'views_handler_field_field',
  'field_type' => 'field_date1',
);
?>

Where am I wrong?

Thank you.