symfony3 route：不是从路由文件工作，而是从另一个工作

I have two routing files in my project:

event.yml
user.yml

I'm trying to add a new route to event.yml file :

registro_eventos:
    path: /evento
    defaults: { _controller: AppBundle:Event:registroevento }

The function registroeventoAction on the EventController.php file is:

public function registroeventoAction(Request $request)
{
    $evento = new Evento();
    $form = $this->createForm(EventoType::class, $evento);
    return $this->render('AppBundle:Event:registroeventos.html.twig',array(
        'form' => $form->createView()
    ));

}

When I try the route, the answer is err_invalid_response (just like if the route doesnt exists).

I've tryied to add different routes to the same file and always the same amswer (I have to say that the previous routes in this file works ok! )

Finally I've added the route to the user.yml file and works!

Does anyone have an idea why is this happening?

Thanks in advance for your help!

Arturo

Adding information:

The content of the app/config/routing.yml is:

app:
resource: "@AppBundle/Resources/config/routing.yml"
prefix: /

The content of the AppBundle/Resources/config/routing.yml is:

app_user:
resource: "@AppBundle/Resources/config/routing/user.yml"
prefix: /

app_event:
resource: "@AppBundle/Resources/config/routing/event.yml"
prefix: /

app_homepage:
path: /
defaults: { _controller: AppBundle:User:login }

app_candidato:
resource: "@AppBundle/Resources/config/routing/candidato.yml"
prefix: /

This is the content of AppBundle/Resources/config/routing/event.yml (this routes are working propperly, but if I add a new route, this doesn't)

home:
path: /home
defaults: { _controller: AppBundle:Event:index }

indice_eventos:
path: /indice_eventos
defaults: { _controller: AppBundle:Event:indice }

inscriptos_evento:
path: /inscriptos/{slugevento}
defaults: { _controller: AppBundle:Event:listadoInscriptos, slugevento:null   }    

inscriptos_excel:
path: /{_filename}.{_format}
defaults: { _controller: AppBundle:Event:excelInscriptos, _format: xlsx }    


inicia_registro:
path: /inicia_registro
defaults: { _controller: AppBundle:Event:iniciaRegistro }    

datos_personales:
path: /datos_personales
defaults: { _controller: AppBundle:Event:datosPersonales }  

And finally the content of AppBundle/Resources/config/routing/user.yml

login:
path: /login
defaults: { _controller: AppBundle:User:login }

login_check:
path: /login_check

logout:
path: /logout


register:
path: /register
defaults: { _controller: AppBundle:User:register }

user_email_test:
path: /email-test
defaults: { _controller: AppBundle:User:emailTest }
methods: [POST]

user_edit:
path: /my-data
defaults: { _controller: AppBundle:User:editUser }

usuarios_list:
path: /usuarios
defaults: { _controller: AppBundle:User:usuarios }

usuarios_search:
path: /search
defaults: { _controller: AppBundle:User:search }  

registro_eventos:
path: /evento
defaults: { _controller: AppBundle:Event:registroevento }   

editar_evento:
path: /evento/{idevento}
defaults: { _controller: AppBundle:Event:editevento, idevento:null }  

borrar_evento:
path: /delevento/{idevento}
defaults: { _controller: AppBundle:Event:deleteEvento, idevento:null }  

In file app/config/routing.yml you should add the routing files:

my_events:
    prefix: /events
    resource: "@appBundle/Resources/config/event.yml"

You can access using "PATH/events/evento"