I really need help!

[Skeet]

My ball hasn't eaten in over 2 months. I had her eating live medium rats a month after i got her, but it only lasted for a month. Then I tried a pk which she took and I was extatic, the next time I offered a pk rat she refused to eat it and has refused every week since. I know that they can go a long time, but she's starting to lose some weight. I have even tried offering her a live pup the last time and she even refused that.
She had been in a 30 gallon tank with a warm side around 88 and cool side about 76. this past week I moved her into a reptiles basics rack with pretty much the same temp radiants. I need tip on how to get her to eat. I used to feed her in her tank really quietly at night and let her do her thing, but I can't do that with her in a tub. How can I feed her outside of her tub without her feeling vulnerable, she is a very shy snake?
Thanks in advance, any help would be apreciated.