QuickForm radio button question

I have been trying everything i know to get the checked feature to work with radio buttons in quickform. i am creating a group of radio buttons, so i am using the method: $radio =& HTML_QuickForm::createElement('radio','name','label','text','value','attributes'); then $form->addGroup($radio,'group','Group Label'); for attributes i have tried array('checked') and array('checked'=>'checked') and array('checked'=>true), but i can't seem to get it to work. i have also tried with a normal addElement tag: $form->addElement('radio','name','label','text','value','attributes'); I even tried modifying the radio.php file in HTML/QuickForm/ to include an if statement that says if (array_key_exists('checked',$attributes)) $this->setChecked(); and i still get nothing. the html has no checked tag at all in it. Not sure if it matters, but i am using php 4.3. Thanks in advance for your help. Tanner