I got that information from Alldata.

As I understand it, your key CANNOT be programmed (which is why your 'spare' key won't work either) - the car learns from the key, or at least learns to recognize the key.

Do a search on this forum for Smartkey. There are a bunch of threads you will find helpful. One of them (I don't have time to find it at the moment) has a lot of detail about the different types of keys, replacement versus new key, etc. and there are others who have had problems similar to yours.

Good luck.