Having just built my HTPC and attached the Gyration keyboard and mouse (and nothing else yet), I'm having a problem with the keyboard. I followed the instructions - put the receiver into Learn mode, pressed 'teach' on the mouse and the LED on the receiver flashed very quickly for a few seconds. Then did exactly the same with the keyboard but got no response from the receiver. Switched it out of Learn mode and the mouse works fine but nothing from the keyboard. Went back to 'learn' and did it again with the same result. On checking the channel, both the mouse and keyboard are on channel four (I do understand that only 1 device on a channel can work at a time but you can two devices per channel). Just in case, I tried to get the keyboard accepted on channels one, two and three as well but no joy. So currently I have to key unpluggung my keyboard from my PC upstairs and plugging it in on the new PC downstairs and vica versa! Anyone got any experience of this problem and maybe knows what's wrong?