Also, whilst the keyboard data stream is a serialised one, it's not RS-232, which is what your suggesting when you talk about serial ports - which is probably why figuerres introduced the possibity of it being an RS-232 device - I'd doubt it.
You'll also need to explain what you mean by doesn't work. eg it seems to be getting no power, etc.
Rich,the OP said he was connect it to a serial port on his desktop. using a usb converter on his laptop.