I am still struggling with this installation, which I suspect is
something to do with the fact that RT has been installed from a Debian
packages and RTFM from a tarball.
Anyway, I think I am missing some code which would get added by the RTFM
install which adds, amongst other things, the RTFM menu in RT. I also
think that the same code may add the relevant code (or a link to a file
which contains it) to load the RT:FM modules.
Any help greatly appriciated.