If it has a USB plug, try attaching it through a different port hub, i.e. not the usb port right next to the one that didn't work. If that doesn't work, test the usb port with something else first. If the USB port is not the problem, you may need to download a driver for the keyboard.
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If it has a USB plug, try attaching it through a different port hub, i.e. not the usb port right next to the one that didn't work. If that doesn't work, test the usb port with something else first. If the USB port is not the problem, you may need to download a driver for the keyboard.