Multiple PHP versions using PHP-FPM (Apache Users)

I'm having some difficulties to achieve the goal mentioned in the subject. I have running both 5.6 and 7.2 php-fpm versions, but my tests are rendered using only 7.2 whichever the VH tested. One of them is configured to run php-fpm 5.6 and the other to run php-fpm 7.2

VH configuration

        <Directory />
                Options FollowSymLinks
                AllowOverride None
        </Directory>
        <Directory /var/www/php5.6>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all

    <IfModule mod_fastcgi.c>
        AddHandler php5.6-fcgi .php
        Action php5.6-fcgi /php5.6-fcgi
        Alias /php5.6-fcgi /usr/lib/cgi-bin/php5.6-fcgi
        FastCgiExternalServer /usr/lib/cgi-bin/php5.6-fcgi -socket /run/php/php5.6-fpm.sock -pass-header Authorization
        <Directory "/usr/lib/cgi-bin">
            Require all granted
        </Directory>
    </IfModule>

    </Directory>

PHP 5.6 pool

[php5.6]
    user = www-data
    group = www-data

    listen = /run/php/php5.6-fpm.sock
    listen.owner = www-data
    listen.group = www-data
    listen.mode = 0660

    pm = dynamic
    pm.max_children = 5
    pm.start_servers = 2
    pm.min_spare_servers = 1
    pm.max_spare_servers = 3

FPM Status

# systemctl status php5.6-fpm.service
● php5.6-fpm.service - The PHP 5.6 FastCGI Process Manager
   Loaded: loaded (/lib/systemd/system/php5.6-fpm.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2017-12-05 09:03:01 -03; 27s ago
     Docs: man:php-fpm5.6(8)
Main PID: 28208 (php-fpm5.6)
   Status: "Processes active: 0, idle: 4, Requests: 0, slow: 0, Traffic: 0req/sec"
   CGroup: /system.slice/php5.6-fpm.service
           ├─28208 php-fpm: master process (/etc/php/5.6/fpm/php-fpm.conf)
           ├─28209 php-fpm: pool php5.6
           ├─28210 php-fpm: pool php5.6
           ├─28211 php-fpm: pool www
           └─28212 php-fpm: pool www

Any clue?

_______________________________________________

Daniel A. Rodriguez
Departamento de Tecnología para la Gestión
Escuela Provincial de Educación Técnica N° 1
Posadas - Misiones - Argentina
(0376) 443-8578
www.epet1.edu.ar