They wanted her to commit to a model of "growth and change"... and she's suing because she believes in "predetermination." By which I guess she means God doesn't want her to change...
MORE: http://www.patheos.com/blogs/friendlyatheist/2014/01/23/growth-and-change-is-against-my-religion-says-jehovahs-witness-in-lawsuit-against-employer/