It is not working on forms you've created in the cms, only works on custom forms you create in yr controller.
Take a look at this: http://doc.silverstripe.com/doku.php?id=form for more information on forms.
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It is not working on forms you've created in the cms, only works on custom forms you create in yr controller.
Take a look at this: http://doc.silverstripe.com/doku.php?id=form for more information on forms.