This one is terrific, imo. She demos on a 98 but it's the same threader. Be sure your needle is in uppermost position (I hit needle up/down button) and presser foot is down.
I hope this helps you as it did me.
This feature is fantastic once you get the hang of it~and you will after doing it just a few times
http://youtu.be/ULHqbgrnJdk