I've had my bluetooth Mighty Mouse for over a year, and never had any problems. I haven't used it for about 6 months, but recently since I have the wireless keyboard, I've decided to get the mouse out again for use when I'm at my desk. However, it doesn't seem to be functioning correctly. If I press the button in the underneath of the mouse, the green light comes on, then goes off and my laptop cannot see the mouse. If I hold down the button, the laptop will find the mouse, connect to it and pair with it. Then, the connection is lost. I have put brand new batteries into it. The mouse never works even for the fraction it is paired, once it is configured in the bluetooth preferences, it is gone and fails to work. I am however, missing the bit that clips on the bottom to seal the battery compartment, but that is not an issue since it doesn't hold the batteries in place or make any sort of contact with the buttons. I'm a bit stumped, as I'd really like to use my mouse again! P.S. I've tried restarting, so it isn't a wake from sleep issue, it just doesn't work full stop.