Hi, I have a problem. I used to type on my MBP with a regular-non new model-white-full-size bluetooth keyboard. A few days ago, it said that the battery was low. Now, I put a new set (rechhargeables) in it, and it won't turn on! I've checked the +/- orientation, but it's right. Am I misising something? The computer Bluetooth seems to work well. When I try to turn it to on, the light next to the switch doesn't work, and neither do the light on the Caps Lock key. How could it die?