Error Code 41 – Missing hardware

I recently installed a new Logitech cordless keyboard/mouse combo. The items installed successfully but when trying to use the keyboard I received the following error:
“Windows successfully loaded the device driver for this hardware but cannot find the hardware device. (Code 41)”
Any assistance to overcome this problem greatly appreciated.
Operating System: WinXP 64bit, 2gb RAM, Athlon64 3500+ processor.
Many thanks in advance of your help.