They need a particular type of SIMM. The 16Mbyte SIMM MUST
be made up of 8 chips of 4Mx4 and not 2Mx8
Fit a SIMM with 2Mx8 chips and it won't boot.
I had the same problem with DJBase's Atlantis. I had perhaps 20+ 16Mbyte SIMMs of various makes and only one had 4Mx4 chips
The SIMM in the photo has 8 * 4Mx4 chips