sorry for the off topic not NetBSD related question...

I have purchased 4 RAM modules last week from Crucial.
4x256MB 168 pin DIMM SDRAM PC100 ECC to install them on a Compaq XP1000
machine.

I Removed from my machine the 8X64MB I had and installed the 4x256MB new
modules.

RAM does not work, when machine starts it keeps beeping like if no RAM
were present. I Tryed to add the 4 old RAM modules in the 4 left empty
sockets.
Thus 4x256MB + 4x64MB but same does not work.
It works only with the old RAM and with all the 8 sockets filled.
The old RAM filling 4 sockets does not work as well.
Do I need to have all the sockets filled with same modules capacity ??
IT looks weird....
Do I need to reset something in the SRM before installing new ram ?


any hints ? 

thanks

Rick