Doors dont unlock when taking keys off.

I own a 2000 Grand am Gt. Recently when i turn the car off the doors stopped oppening. Only drivers door unlocks automatically all other 3 dont do anything i have to press unlock button to let other people out. It didnt do that before any ideas ??? Help will be gladly appriciated

do this step:
Press the lock button of the driver door during 10 seconds, you will hear a bell and the mode you are looking for is for Mode I, you need to release the lock button when you hear 1 bell.

We also have that section of the booklet that came with your car in the sub forum.

Programing Automatic Door Locks (http://www.automotiveforums.com/vbulletin/showthread.php?t=681854)

Thank you so much guys for your help !!!!! Thanks Really appriciate it !!!!