We have an old LJ4 in the office. We're trying to upgrade the memory in the dang thing, but every SIMM we stick in there isn't being detected. We run a test, and it just keeps saying its got the same 2MB in it. I believe all our SIMMs are FD or EDO. I can't find anything helpful on HP's site about it. HP just says we need to order the memory from them to be sure we have the right part. (of course)

So what's up? Does this thing take parity or something?