Wow. I can't believe I didn't think of this before... I figured that my BP just does NOT want to eat F/T. But I just realized that both times I tried to feed it to her, I had moved her to a separate tank. Since then, she's been on live, and apparently she ate F/T all the time before I got her, so I don't know if she'll revert back, but it's worth a shot!
EDIT: I also should have mentioned that since switching to live, I'd starting feeding her in her enclosure.