php - Model autoloading not workin in CodeIgniter -

so i'm autoloading models this:

$autoload['model'] = array('user_model','article_model','settings_model','authenticate_model');

and have next files:

models/user_model.php:

<?php  class user_model extends ci_model {          public function __construct()         {                 parent::__construct();         }  }  ?>

and next error appears:

unable locate model have specified: user_model

and if access file directly:

you don't have permission access /application/models/user_model.php on server.

so can causing problem?

as @beatalex said, issue first letter of models being in lower case. reason when changing name before, , pushing git using command:

git commit -a -m "broke everythink"; git push heroku master

it wasn't changing name of file.

i had delete files, push changes, , create them again , push them again, , it's working.

Lix