Mike,
I got in three wild caught females about 4 years ago. Two of them ate fine. One of them did not. She came in at around 1300 grams (she was gravid when caught in the wild, and laid eggs before I got her) and very skinny. She did not eat for 56 weeks. She got down to about 900 grams before she took her first meal. Once she started eating, I was able to get her up to 1900 grams in about 4 months, feeding mice alone. Below is my recommendation.

Continue to offer her meals once per week, no matter what. Offer her a smaller than normal rat one day, and a mouse the next (an ASF the following day if you have access). Once she eats one of them, offer that prey item only for the next 3-4 weeks. If she continues to feed, bump up the frequency of the item. In our case, she ate a mouse (which is small for an adult female). After 4 weeks of eating 1 mouse per week, I bumped her up to 2 mice per meal, twice a week. Not long after, she began eating 6 mice per week.

These snakes will try your patience, but persistence will usually win in the end. With that said, there is a chance that she will die in captivity, because she will not eat. Some people may tell you to assist feed her, but being that she is WC, and obviously has willingly eaten at some point in time, I believe that assist feeding is just prolonging the inevitable. If you were to assist, and this is the only way to get food in her, are you willing to possibly continue doing it for the next 20+ years. I know that sounds harsh, but it is my opinion.

I hope that helps, and good luck,