RachelRachel 133k6767 gold badges315315 silver badges510510 bronze badges two three Rachel, you might be a wonderful genius!!! And that i am an fool. Thanks a lot for the solution. I had been binding to self and didn't have a 'ConfigurationModel' property in my IncrementingTextBox class. Fields are the one mechanism https://yashikaplatinastreetsector109.blogspot.com