You can only have one of them. As this person points out: https://serverfault.com/questions/384715/fastcgi-error-with-apache2
Try adding it into the general config, not in side the virtualhost. It seems like you're trying to configure apache virtual hosts the way you'd do it for nginx. Maybe just add it to the apache.conf before the lines to read in sites_enabled
Normally this would be in a conf-enabled file.