Hello,
Seeing as your car has lived through 24 years of use, it is possible that your light bulbs may be burned out. Although unlikely, not impossible. You stated that you got the correct instructions from your previous post...were you able to start the car? ...if so, then I would think that the glowplugs are working, and that the lightbulb is not.
Of course, I could be full of crap too.
-Larry