ND2730 has HW compatibility issue with Old Delkin UDMA CF. No problem with new Delkin UDMA CF. See following photo for un-compatible CF.
This compatibility issue is related to HW, so cannot be fixed.
This CF compatibility issue apply to ND2730 with serial number lower than [NPS1202100000]. This problem shall be fixed at the ND2730 with serial number higher than [NPS1202100000].