Some of what I'm about to say has already been said in response, but I must reiterate.

1. Separate housing is a must.
2. try loosely wadding up some news paper to fill 2 thirds of her enclosure. The ability to hide will greatly reduce her stress level.
3. do not box feed. the act of moving her from her regular surroundings will increase her stress.
4. try feeding her a live mouse hopper. the movement of the hopper will keep her attention.
5. ensure that humidity stays around 50-60 %
6. ensure temps are at the correct range.
7. have her checked out by a vet that is familiar with snakes.

Good Luck, keep us informed of her progress.