Crystal Reports Modifying a formula field in code

Message

I have a formula in my report called Dummy which is equal to a string called "dummy". 
In code I Say:
MyReport.DataDefinition.FormulaFields("Dummy").text = "Smarty"

When I run the report, I get the error "The remaining text does not appear to be part of the formula."

Any help would be appreciated.

visual studio 2005 and Crystal that came with it.

Thanks, Bill V.

Edited by billev - 01 Jan 2012 at 5:58pm