Headers Expires con Apache

No httpd.conf:
Descomentar LoadModule expires_module e LoadModule headers_module

No httpd_aplicacion.conf:
Alias /alias"/ms4w/apps/alias/htdocs"
ExpiresActive On
<Directory "/ms4w/apps/alias">
AllowOverride None
Options Indexes FollowSymLinks Multiviews
Order allow,deny
Allow from all
ExpiresByType text/css "access plus 1 month"
ExpiresByType text/javascript "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
</Directory>
<FilesMatch "\.(css|js|gif|jpg|png)$" >
Header append Cache-Control "public"
</FilesMatch>