I wrote so many posts about this up till about 7 months ago. My DD was exactly the same, she's now reading Thea Stilton and eyeing up my Harry Potter. Basically she had it in her head that you read at 5. She couldn't really read at all when she started school, then it just clicked. She still had to go through all the levels (she wouldn't have been able to read Harry Potter in June) but each level was about 2 days.
One thing that really helped was making her do the practise books school sent home and also a lightly worded activity book that we just flat out refused to help her with. The first 4 weeks were meh, then wow.
