Ball Hasn't Eaten In Months

Hello guys ^^

A few months ago (About 6, I believe) I acquired a ball from a friend. She is female, normal, and almost four feet in length.
Problem is, she refuses to eat, and hasn't consumed anything since I got her.
I've tried everything. Putting a sheet over her cage, live feed, F/T feed, smaller mice, larger mice, rats, braining, I've done everything.

Any help guys...? I'm open to any suggestions!

Can you give us more info on how you are housing the snake?

1. what size/type cage

2. What are you using to heat the cage

3. What are you using to measure temperatures

4. Are you using a thermostat/dimmer to control any of your heat sources?

5. what are your current cage temperatures/humidity?

6. What type of hides do you have and how many are in the cage?

7. How often are you offering food?

8. How often are you handling the snake?