Function as DataPropertyName

I have an Access 2007 form that I converting over to VS2010. The form shows rows linked to a query. One of the columns in the 'form' is a function which is passed one of the fields of the query, and it returns a calculated result back to the form field.

The 'Public' function is called fncTRTAccomplishment(parmReader) and is passed the field [Reader ID] so that I have entered it into the DataPropertyName as =fncTRTAccomplishment([Reader ID]).

I don't get an error, but I know that the function isn't being called because I have Debug.Print statement at the beginning and nothing is appearing.

Thanks for your time in advance.

Paul D. Goldstein Forceware Systems, Inc.