2003 Honda Odyssey battery died. After getting car started, had to enter the 5 digit code for the factory radio that also controls the rear DVD player (I've done this before and it's worked). This time it won't accept the code. I know I have the right code, it just wont accept it. I've tried disconnecting power to the radio for an extended period of time, no change. Any ideas? (the tip to unplug the antenna doesnt work either). Thanks!