DataObjectManager pop up does not open in a separate window.

[neerom]

Hi,
I am using 2,4 version. The problem is that DOM pop up opens in the same page. Not in a separate page.

$f = parent::getCMSFields();
$manager = new ImageDataObjectManager(
$this, // Controller
'Images', // Source name
'ImageResource', // Source class
'Attachment', // File name on DataObject
array(
'Title' => 'Title',
'Caption' => 'Caption'
),
'getCMSFields_forPopup'

    );
    $f->addFieldToTab("Root.Content.Gallery",$manager);

    return $f;