I'm in agreement also with Brett. Besides, the bites really dont hurt, more of a startle factor than anything else. Make sure you are not coming directly at his/her face with your hand, come from the back with your hand if possible or underneath the head, but not directly at. I've found that to be helpful with my BP that came from another household that didn't take care of them. And like someone else said, no fast movements. A slow hand makes a happy snake...or something like that.
Be patient and continue to try and handle her...NOT attempting will only make things worse....I had a gopher snake that never lost his temperament and it was partially my fault because I rarely handled him due to this fact (I was 12).