Have you tried switching her substrates? Changing from Aspen to Newspaper helped my girl eat--but for some snakes it's the opposite. Even how large or fine the aspen chips are is enough to change some snakes eating habits. Either way, good luck with her--some snakes are just picky little things, haha. At least you know she needs you, in the wild she would have been long dead by now with those picky eating habits!
Cheers,
-Matt