FormBuilder and linkNewValue

Hi PEARs, I'm trying to use linkNewValue, but i get the following error: Fatal error: Call to undefined function: setformtemplate() in /usr/share/php/DB/DataObject/FormBuilder/QuickForm/SubForm.php on line 137 I'm using Object renderer, and a custom FB class for setting some options: class MyFormBuilder extends DB_DataObject_FormBuilder{ function MyFormBuilder(&$do, $options = false) { parent::DB_DataObject_FormBuilder($do, $options); } function &create(&$do, $options = false, $driver = 'QuickForm') { $fb = &parent::create($do, $options, $driver, 'MyFormBuilder'); // [options here] return $fb; } } Which changes should I make to fix this issue? Thanks, Rodrigo.