Apple Aluminum Keyboard and 23" cinema Display and MacBook Pro??

Hello there
I have just purchased an Apple Aluminum Keyboard and have and MacBook Pro with and 23" cinema display, and if i try to connect the keyboard to my cinema display via USB the keyboard don't work.
i have an Apple mighty mouse that works fine wen connected to the USB port on the display...
why is it not working...

have you tried a different USB port on the ACD? Maybe the one you used was defective? I run a 7-port bus off one of the USB ports for all my hardware. OTOH, I do use bluetooth mouse and keyboard!

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