[eluser]TheFuzzy0ne[/eluser]
Try replacing this line:
Code:
$this->form_validation->set_message('email_existente', 'Error in e-mail');
with this:
Code:
$this->form_validation->set_message('verificaEmail', 'Error in e-mail');
The first parameter of the set_message method needs to be the name of your validation method.