Hello and welcome. It is quite often very difficult sometimes impossible to introduce a buck into a doe's environment. What I would do is separate them and find a neutral area where she has not been then reintroduce them in this. Always put the male in first as he really needs to be the dominant one and as she was with you first it isn't going to be easy to bond them. Females are so territorial - if you don't have a neutral area you could find someone (a local Rescue for instance) who will bond them for you. Once bonded I wouldn't try putting them back into her hutch as she will possibly remember it is hers even after you have neutralised it. Keep us posted.