HHelen I am sorry that the other posts were deleted. Essentially we are all on the same page here. When you asked your daughter to wear a belt, I am sure a level of trust was established first. It is a very personal and powerful statement that both the keyholder and wearer have to be aligned with before a belt is worn. I am sure with your daughter you told her the virtues of belt wearing, the values of doing so, etc. beforehand.
I did the same with @Susan and @Kate2. I told them the belt is a shield, not a sword. It is for protection not punishment. In the case of Monica and Jane, she would look at it as punishment and would not agree to wear it. No love or trust had been built so success was impossible. A sad case for sure.