Running Windows 7 Pro on Dell Optiplex 3020 minitower. Intel pentium motherboard. I'm trying to plug in a multimedia card reader into the internal USB port. See pictures of internal port and end of multimedia reader. Seems pretty simple. After I plug it in and turn on computer the new disk drive devices should show on my computer and device manager, but they don't. Tried putting in an SD card on the chance the drives won't show unless they have a card plugged in. Still nothing. I don't think those internal usb ports need to be enabled or anything. Tried two different card readers taken from other computers. Neither works.