RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges 2 3 Rachel, that you are a good looking genius!!! And that i am an fool. Thanks a lot for the answer. I had been binding to self and did not have a 'ConfigurationModel' property in my IncrementingTextBox class. @Kent points out https://amrapaliprojectsinnoida.blogspot.com/