[Plugin: NextGen] Shadowbox is not working

Hi there,

I have a problem with Shadowbox for the NextGen plugin.
When i click on an image, that image will be shown in the parent page instead of shadowbox overlay.

I even edit the effect field, to custom: rel=”shadowbox[%GALLERY_NAME%]”
But it still doesnt work.

You can see it on: https://www.robinkoornwebdesign.nl/wordpress/nggallery/page-41/album-all/gallery-1/

Please help me.
Thanks!

p.s. i also use the Featured Content Gallery plugin