Mazda Protege 2002 ES Remote Entry Key

I own a mazda protege es 2002 and one of my remote entry key stoped of working and I was told that it might need to reprogram it but I has been looking around and I haven't found any information to do it and I would like someone in this forum to help me out to program it.

Try doing a search over on msprotege.com

They have a ton of info there.

1. Make sure there are no keys in the ignition and that all doors are closed
2. Open driver's side door
3. Insert key into ignition switch and cycle the key between the ON and LOCK positions 3 times
4. Remove key from ignition switch
5. Push the driver's side door sensor switch 3 times
6. Verify that the doors lock and then unlock.
If nothing happens, wait 40 seconds and start from step 3 again
7. Press any button on any transmitter twice
8. Verify that the doors lock and then unlock
If nothing happens, see note A
9. If you have only 1 remote, press any button on that remote twice.
If you have 2 or 3 remotes, press any button on any of the other remotes twice.
10. Verify that the doors lock and then unlock
If nothing happens, see note A
11. If you have 1 or 2 remotes, press any button on either remote twice.
If you have 3 remotes, press any button on the 3rd remote twice.
12. Verify that the doors lock and then unlock
If nothing happens, see note A
13. The codes should now be reprogrammed

Note A:
1. Hold down the driver's side door sensor switch
2. Verify that the doors lock and unlock twice
3. Start from step 3 again