Try just one drive at a time.
Test as Master on the end black connector and the blue connector to the motherboard.
ok I have 2 problems here I have a quantum bigfoot TX
it is a huge harddrive. I placed this into my old computer without any tab on the jumper settings and on the space farthest from the mother board on the ide cable when I go to boot the computer it says detting hdd primary slave QUANTUM Bigfoot TX4.BAT but says nothing about detecting the master then it says Primary master hard disk fail I have added the pin to the jumper settings in the back and set it to master but when I do this it says detecting primary master none detecting primary slave none then when I let it boot through it gives me a Disk I/O error Replace the disk and press any key the harddrive im putting in has no operating system on it