This is my `hook_menu`:

    $items['events/%event'] = array(
      'title' => 'Event',
      'title callback' => 'entity_label',
      'title arguments' => array('event', 1),
      'page callback' => 'events_view',
      'page arguments' => array(1),
      'access callback' => 'entity_access',
      'access arguments' => array('view', 'event', 1),
      'file' => 'events.pages.inc',
    );

    return $items;

But when I navigate to `events/2` there's a 404 error waiting! Here's the page:

![Page not found!][1]

As you can see, my `Event` has been successfully created (it exists in database and its `id` is definitely `2`) but the requested page could not be found and `Shortcuts` menu and `Navigation` block has disappeared.<br>
What possibly could I mistaken?<br>
Feel free to ask for more information.<br>
Thanks.

EDIT:<br>
I'm using Drupal 7.12

  [1]: https://i.sstatic.net/XXfUE.png