Hey!
One of my girls was exactly the same - it takes quite a bit of patience on your part i'm afraid! The best thing to do is grab one of the wriggley little blighters, plop it in a basin full of cold water, then use your nails to cut it into small bits less than a cm long. Then take a tukey baster, suck up one bit, then keep dropping it and picking up the little bit of worm just past the axies face until the axie snaps for it. She should find it quite manageable. It used to take mine ages to eat one bit at a time with this method - now when she sees the baster she just clamps her chops around it till she gets a bit of worm. I increase the size of the worm weekly by just a millemeter or two - I'm hoping eventually she will take a live full size worm, just like my other axies.
Good Luck!