Explain it to her that you are not telling her off for her actions but that rather you are trying to let her know where she went wrong.. and maybe the way that you say or answer her when she does a mistake is the reason why she thinks this so just think of the tone and words that you chose to use when telling her something about a mistake she made.. be sure not to keep blaming her for the mistake as you do this because after all we are all humans.. I think this may help.. Good luck
AUZANO