Mazda Smart Card

I'm getting a 2007 RX-8 Grand Touring next week. It comes with two SmartCards. With pressing any of the buttons on the card I get 0 response from the car; no lock, unlock, alarm, nothing. But the smart card has a red light that comes on when I press a button. But strange thing is when I press the black button on the car handle, the red light flashes on the SmartCard. I've changed the battery so I don't think that's the problem. Can anyone tell me what's going on. HUGE thanks in advance.