If the FastATA 1200 controller is installed under the MEDIATOR busboard you have to remove the plastic holder from the PRIMARY PORT ribbon (as on photo no.13 of the printed MEDIATOR PCI User Manual). See photos below:

Installation of the PATA CD/DVD drive, PATA hard drive, SATA hard drive and CF card in the D-BOX 1200 system, when using the FastATA 1200 MK-IV CF/SATA controller: