I am not sure just putting the .conf in the conf-available directory is enough to have that configuration used. You may need to use the a2enconf command to enable the configuration. This is a guess based on the existence of that directory. Please consult your Apache documentation for the exact setup for your Apache.
After updating Apache configuration you need to restart the Apache server for it to use the new configuration.
After updating Apache configuration you need to restart the Apache server for it to use the new configuration.