If I am reading this correctly, you have been divorced for some time, and your daughter has had to hear you and your ex talk about each other ever since then. If so, I understand your daughter not wanting to hear once again about how you feel about her father, (or how her father feels about you, for that matter).

It's unfortunate that you guys are unable to maintain a civil relationship after being divorced, but your daughter should not be the sounding board when you guys want/need to vent your feelings about each other or past issues. She is your daughter, not your therapist.