RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 three Rachel, you are a wonderful genius!!! And I am an fool. Thanks a lot of for the answer. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. ✦ Look at refactoring a class https://gaurprojectsinnoida.blogspot.com/