** Start of listing of h.ft **
WriteLine "Content-type: text/plain;charset=us-ascii".
WriteLine "".
WriteLine "Hello world!".
** End of listing of h.ft **

Here is the directory entry for that source file:
-rw-------  1 rem  user  95 Mar 15  2008 h.ft
   ^ Note user execute permission *not* needed for source files.

Assuming ft is the name of the Flaming Thunder compiler,
and it is runnable directly from the command line, do this:
% ft FILE h.ft OUTPUT h-ft.cgi
then you might also have to do this:
% chmod u+x h-ft.cgi
which results in:
-rwx------  1 rem  user  20480 Mar 15  2008 h-ft.cgi
   ^ Note user execute permission needed for all CGI programs.
(because compiled-ft is native machine code run directly on machine)