You could try cleaning the connectors that connect the ram board to the main cyberstorm board, they might have become dirty or slightly corroded over time and be making a bad contact - try some contact cleaner or isopropyl alcohol and a toothbrush, wait for it to dry then re-try with your original ram. You could also clean the ram sockets and simm contacts too. I've had lots of problems with old hardware and bad contacts, usually can be resolved with this method :-)
Hope you get it working soon,
Robert.
