Lightbox [gallery link="file"] not working…

hi guys, i have searched high and low for an answer… but i cant seem to find a resolution to this…

I have installed a lightbox 2 but for some reason i cannot seem to activate the lightbox script unless im using nextgen…

i want to use [gallery link="file"] and let it load up the lightbox when an image is clicked.. but nothing happens…

any help?? anyone???

thank you and kind regards