Laravel 5 FatalErrorException with a provider

I configured my config/app.php file and I added this provider:

'providers' => [
/*
  Foti Services Providers
*/
 Foticos\LaravelFotiServices\LaravelFotiServicesProvider::class,
],

I have created and added namespace to my LaravelFotiServicesProvider file:

<?php 

namespace Foticos\LaravelFotiServices;

use Illuminate\Support\ServiceProvider;

class LaravelFotiServicesProvider extends ServiceProvider {
...

But Laravel 5 reports me this error:

FatalErrorException in ProviderRepository.php line 146:
Class 'Foticos\LaravelFotiServices\LaravelFotiServicesProvider' not found

What´s the problem?

via Chebli Mohamed