Update: I got her to stand still and spray at long as Im touching her where I spray she is fine and wont move. Little bit of a hassle but its progress. Will continue to work with her on it. Thank you all for the information!!
Just keep at it until she figures out that no matter where she goes, what she does, she can't get away from it AND that it really isn't going to kill her. It's a frustration 2 or 3 day process but in the end, she'll be great for fly spray. She may never learn to LOVE the fly spray, ahem Skippy, but she'll learn to tolerate it.