My son is the same age as your DD. He went through a phase over the summer where he wanted nothing to do anymore with chapter books. He lives all things silly, and just recently someone mentioned the Fly Guy books. He read all of them in a few days. That got him back into reading longer books he also loves Scooby Doo, so we buy him those chapter books and he does great. He still has no interest in the Magic Tree House or Junie B books though. DS 6 loved those when he was 4.
Maybe look for a chapter book series with a character she loves?
