have you set in IDEFixPrefs
Connector Type= A600/A1200/A500 (or Auto)
4-Drive Adapter= EB Standard
and "Atapi enabled"?
About the LoadIDE thing, AFAIK its useful only if the scsi.device isn't correctly patched, anyway if you wanna try i have:
C:LoadIDE START QUIET
C:SetPatch SKIPROMUPDATES "scsi.device" QUIET
as very first line in S-S. (check to have LoadIDE in C:)