Renaming index.html to index.shtml

[Jel]

Hmm, that doesn't work for me, I have

RemoveHandler .html .htm
AddHandler server-parsed .shtml .html
AddType application/x-httpd-php .php .htm .html

in my root htaccess file but can't get the command

<!--#include virtual="insertfilehere.extension"-->

to appear on my pages, what dumbass thing am I doing wrong, any ideas?

TIA