I will suggest you to have a week or some few days of break. forget about it . and start over maybe she just wants a little break to miss her work and when she re takes it she may feel more excited about it.
Also children are different, if she doesn't show you that she can recognize words it doesn't mean she doesn't know them! Try also to change the rourine , make ir concrete, for example flashcards with real objects, not only tv or computer screen, they need to feel the objects.
check this blog
you may find some ideas.
www.olivesandpickles.blogspot.com