symfony - can't pass argument to event listener -

using symfony 2.5.3. i'm trying send 'welcome' e-mail when has succesfully registered(fos userbunde), using eventlistener. event fired fos_user.registration.success.

so added service:

mycustom_user.registration_success:     class: mycustom\userbundle\eventlistener\registrationlistener     arguments: [@mycustom_user.mailer]     tags:         - { name: kernel.event_listener, event: fos_user_registration_success, method: onregistrationsuccess} 

the listener itself:

namespace mycustom\userbundle\eventlistener;  use fos\userbundle\fosuserevents; use fos\userbundle\event\userevent; use fos\userbundle\event\formevent; use mycustom\userbundle\mailer\mailer; use symfony\component\eventdispatcher\eventsubscriberinterface;  class registrationlistener implements eventsubscriberinterface {     protected $mailer;      public function __construct(mailer $mailer)     {         $this->mailer = $mailer;     }       public static function getsubscribedevents()     {         return array(             fosuserevents::registration_success => 'onregistrationsuccess',         );     }      public function onregistrationsuccess(formevent $event)     {         $user = $event->getform()->getdata();          $this->mailer->sendwelcomemessage($user);          $url = $this->router->generate('fos_user_security_login');         $event->setresponse(new redirectresponse($url));     } } 

the mailer contains rendering of content of email, registered service:

mycustom_user.mailer:     class: mycustom\userbundle\mailer\mailer     arguments: ['@templating'] 

mycustom_user.mailer argument listener. somehow keep getting error:

catchable fatal error: argument 1 passed  mycustom\userbundle\eventlistener\registrationlistener::__construct()  must instance of mycustom\userbundle\mailer\mailer, none given,  called in mycustom/app/cache/dev/appdevdebugprojectcontainer.php  on line 2214 , defined in mycustom/src/mycustom/userbundle/eventlistener/registrationlistener.php line 19 

i tried other arguments @doctrine (and changed listeners constructor accordingly), keep getting same error. @templating argument mailer service doesn't work.

what doing wrong here?

so, problem had had 2 listeners in 1 class. , 2nd service definition didn't contain argument constructor. should this:

mycustom_user.registration_initialize:     class: mycustom\userbundle\eventlistener\registrationlistener     arguments: ['@mycustom_user.mailer']     tags:         - { name: kernel.event_subscriber, alias: mycustom_user_registration_listener}  mycustom_user.registration_success:     class: mycustom\userbundle\eventlistener\registrationlistener     arguments: ['@mycustom_user.mailer']     tags:         - { name: kernel.event_subscriber }