Can't get it to receive power, I've got it plugged

Can't get it to receive power, I've got it plugged in to the power supply! I bought this Genica GN210 Removable Hot-Swappable IDE HD tray, because I wanted something simple for the extra HDs I am accumulating. I removed my old IDE HD from my old broken computer (HD is fine though). I installed the GN210 into my new computer, which uses SATA for all it's other HDs and even the CD/DVD-ROM. There is one IDE slot on the motherboard, so I plugged an ATA cable from there to the GN210, then I hooked up one of the unnused power cables from the power supply. Turn on my computer and the GN210's power indicator light doesn't even come on!!! Anyone know if there is something I need to do before using one of the unnused power cables?