Ground Manner Help!

I have recently started training a 4 year old TB Mare. She was trained to walk on a lead as a two year old and let out to pasture for the past two years. She's very sweet and very curious, until you start doing ground work. She will let you brush her all over, except on her hind quarters. She will attempt to kick out at you and try to break free. She won't let you spray fly spray on her, she tries to run you over and lunges at you with her teeth bared. She does the same thing when you attempt to lunge her. She has no problem with you putting a saddle on her or walking around with it on. She is a wonderful horse and I don't want to give up on her. Do you have any tips for me aout ground manners or how to get her to lunge without trying to kill someone. She has gotten the nickname "Crazy" from boarders at my barn.

I would first try to decide is she just being a brat or is there some real issues there. Baby steps and keeping safety in mind at all times for yourself is first and foremost. start over with desensatizing all over. startwith tossing a rope over her body and around her legs, when she stands still for each section then go to the next area. let her move and dance around as much as she wants she will eventually (days,weeks,months?) realize that all that moving around just means work. Be sure to have a long enough lead rope on her so she can move. also keep her nose tipped toward you at all times while doing this so she cant spin on you and kick. you can either use a rope or long lounging whip to gently toss over and around her. Take her back to level one like she has never had anything done with her.Good luck, BE SAFE