To use php includes, your server must have php installed and available to your hosting account, and most require that the html pages be named with a .php extension instead of .html or .htm. To use PHP statements to include the SSI content to your page, add one of the following lines until you find one that works for you. You may have to replace "./cgi-bin/yabb/YaBB.pl" by your board path. If none of these php include methods work, use one of the other SSI methods.