I was attempting to add another remote to my 2000 camry keyless entry system. I was able to successfully enter programming mode, but when I tried to add the remote, the door locks stopped working. Now nothing works, the keyless entry that was previously working, and the automatic door locks are not working.

Any ideas?

Do you have the TVIP alarm system installed on your car, or is it just a keyless system? Was this factory installed, dealer installed, or did you have it installed?