get her where she can see rabbits all the time.i would start out with using a drag,and put rabbit scent on the drag and fool around with her.she will start to get used to the smell,and then she will try to track .this is how i train my beagles .and kill you a rabbit and let her eat it. this will get her going and if you can find local rabbit hunters see if they will let you go with them take your dog and let your dog run with the older beagles hounds they will train her to. i have 28 hounds 5 coonhounds and the rest are beagles hounds.good luck.
go deep hunt hard.