Dynamically set readonly property on input text component in editable table

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I have an input table with an input text component as one of its elements.  I am using an array data provider to populate the editable table.  I am looking to do validation as I populate each input text and set the readonly property to false if a certain condition is met.

I have written the function below and I am calling it via a Call Module Functoin in one of my Action Chains on my page.  Initially, I am calling it during the vbEnter event.  However, I am still able to enter text.  I have analyzed the ADP, and I know for certain there are at least 2 rows where the condition I am checking is true.  I would expect for those 2 rows to be set to readonly.