Are you getting any error messages? I have no idea what the default httpd.conf is with FC but you might need to enable parsing pages for SSI. You might need to add or uncomment these lines in httpd.conf:
AddType text/html .shtml
AddHandler server-parsed .shtml
And make sure that under the options for document root, you have includes enabled, something like this:
Options Indexes FollowSymLinks Includes
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