Need help with Plugable SATA docking station and USB 3.0 PCI-E card

Hi, My Plugable USB 3.0 SATA HDD Docking Station doesn’t seem to be recognized on my Dell Inspiron 560 desktop. I have it connected to your USB 3.0 PCI-E card and I do not see the Auto Play screen. I am trying to backup my old files/programs from a 1TB Seagate SATA HDD to my new WD Caviar Black 1TB SATA HDD. Please help. Thanks, John