I can't seem to add the DOM to CMS, its working in other page types, It must be a typo I'm not seeing

Here is the DataObject

class AccessCodeUser extend DataObject {
	static $db - array(
					   'Name' => 'Text',
					   'Email' => 'Text',
					   'ProductName' => 'Text'
					   );
	
	static $has_one = array(
		'AccessCodePage' => 'AccessCodePage',		   
	);
	
	public function getCMSFields_forPopup()
	{
		return new FieldSet (
							 new TextField('Name'),
							 new EmailField('Email'),
							 new TextField('ProductName')
							 );
	}
}

And in the PageType

class AccessCodePage extends Page {
	public static $db = array(
							  'LifestyleText' => 'HTMLVarchar(255)',
							  'AccessCode' => 'Text'
							  );
	
	public static $has_many = array (
							  'ExtraPageImages' => 'ExtraPageImages',
							  'AccessCodeUsers' => 'AccessCodeUser'
	);
	
	function getCMSFields() {
		$f = parent::getCMSFields();
		
		$f->removeFieldFromTab('Root.Content.Main', 'LifestyleText');
		$f->addFieldToTab("Root.Content.AccessCode", new TextField("AccessCode","Access Code"));
		$f->addFieldToTab("Root.Content.AccessCode", new DataObjectManager(
																		   $this,
																		   'AccessCodeUsers',
																		   'AccessCodeUser',
																		   array('Name' => 'Name','Email'=>'Email','ProductName' => 'ProductName'),
																		   'getCMSFields_forPopup'
																		   ));
		
		
		return $f;
		
	}
	
}

What do you mean you "can't?" Errors? What's it doing/not doing?

Standard White Screen when Accessing the CMS even in Devmode. Everything is fine until I add the DataObejctManager.

EDIT Found the Typo