Can't access to password input on registration form

Hi,

I have a problem. I can't access through module to password field on registration page.

function customization_form_user_register_form_alter(&$form, &$form_state, $form_id) {
 $form['account']['pass']['#id'] = 'userRegInput';
}

It wont change id of input. I don't know why...

Thank you!

EDIT: Btw. i have installed user_registrationpassword module, maybe is because of that...