Page title in subject form

Hi,

I want to add the current post title in the subject of the form inserted in the post.
I am trying with different options like:

add_filter(‘avf_form_subject’,’avia_change_mail_subject’, 10, 3);
function avia_change_mail_subject($subject, $new_post, $form_params) {
$subject = __(‘Message from:’,’baztanet’ ) . single_post_title();

return $subject;
}

I can’t gent the current post title. Hope you can help me. Thanks!