custom form-tag don’t work

hi,
i have add custom form-tag throu the functions.php file.

add_action('wpcf7_init', 'custom_add_form_tag_perso');

function custom_add_form_tag_perso()
{
    wpcf7_add_form_tag('perso', 'custom_perso_form_tag_handler');
}

function custom_perso_form_tag_handler($tag)
{
    return 'ciao';

}

i use [perso] shortcode into body of message into cf7 backend setting.

but it shown’t nothing into my email

Look my pic
https://pasteboard.co/K8S93YV.png

thanks