If I am missing something, I would ask you send us a simple test demo, which replicates the issue.Regards, Georgi Krustev Telerik Hi Georgi, I'll work on putting a demo together.

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Also when debugging using breakpoints the problem behaviour is not seen and the Numeric Text Box updates correctly.

Which would suggest to me that it may be a timing or order of operations issue between the two controls.

I have tried setting the Auto Post Back="True" but that made no difference. When I load the page, I do the following and it works: txt First Name.

Text = "Original Text" On a button press event, I go user. Text; and it works giving me "Original Text" However, if between loading the page and saving the page, I change txt First Name.

Text property, the text you type into the Text Box does not update the source until the Text Box loses focus (for instance, when you click away from the Text Box).

If you want the source to get updated as you are typing, set the Update Source Trigger of the binding to Property Changed.

In the meantime I've noticed some more specific behaviours that may be helpful in determining the cause.

The first call (ie moving from 0 to 1) always seems to be successful and display properly, each subsequent call does not display until mouseover.

What tells us is that the model will be updated only when the widget notifies the binding for any change.