It can't be "not working" yet as all you are supposed to be doing the first couple of weeks or so is sitting with your dog in your lap or in front or beside you, saying "Come" and feeding the dog chicken the moment you get the word out of your mouth! That's all you do for two weeks. There's nothing to "work" yet except your dog mentally learning to associate that word "come" with an instant, wonderful reward for the next two weeks of her life. After a couple of weeks of that over-and-over, repetitive training in short 10 - 15 episode sessions 2 or 3 times a day, only THEN do you move her a couple of feet away and repeat the training over and over and over until she's moving to you in order to get her treat every time you say "Come" - but that step is two weeks off.
Just slow down - you are rushing things way too fast and not giving her time to slowly absorb/associate things before you move move on, confusing her, expecting far too much. Just say "come" and feed her luscious, warm chicken x10 two or three times a day for the next two weeks while she's in your lap or right next to you.
Deep breath, back up, slow way, way down and just do the training as suggested and unless you are the least successful dog trainer on the planet, or your dog is ill/hurting, badly distracted with kids or other dogs playing in the room or scared/ distrustful of you from past experiences, I guarantee you she'll "get it" one day soon and begin to understand that "come" means chicken in her mouth. That's all you want to teach her for the next two weeks.
That's the beginning of training "come" for the very hard-to-train dog or someone with few dog-handling skills - a not uncommon situation now days with people with multiple jobs, busy families and homes to care for, hectic lives and everyone always on the go. It's a lot more common than most think - we're no longer raised on farms with many dogs, learning instinctively all about dogs as we grow up.
I'll bet you that once you learn to slow yourself down and really teach this dog how to associate "come" with a wonderful reward - an instant piece of warm chicken in her mouth - in the next two weeks, she'll finally be ready for the next step. Don't despair!
