I agree with the masses on this one. Try to feed live on the next feeding day. I much prefer to feed f/t...but that does not mean the snake prefers it, too!!!
I had my young bee go on strike from food for longer than I was comfortable with, so I took some solid advice and got her a live mouse. She tagged it almost instantly. She has had two f/t meals sine then. She just needed a jump start, is all.
Good luck!!