anti theft wont work after battery goes dead

Yeah, after your batteries out of juice, you're car won't start. You're probably experiencing a problem wit the keys not coming out. I've seen the same problem a 2003 Nissan Altima. Put a new battery in and it should run just fine. Note: If you need to get the keys out crank the car until the lights on your dashboard come on, let it run for about 30 seconds, and the keys should come out easily.