@Tension: I can't really, the SCSI->IDE adapter only has one port. So it's either Master or Slave on that port and I have no second SCSI->IDE adapter to attach another device.
You can attach 2 IDE drives to one IDE interface. you need a cable with 3 40-pin IDE headers on it instead of 2. They're pretty common.
Perhaps the CF card is expecting there to be a Slave device as well. I have had this exact problem with some IDE drives in the past.
Good luck

EDIT: Just realised i've been talking bollocks. Sorry!!
