[nextgen gallery] link the related images to the photo in imagebrowser view

hi!do you know how to link the related images to the right image in imagebrowser view? this is the link to change:

$out .= '<a href="' . $picture->imageURL . '" title="' . stripslashes(nggGallery::i18n($picture->description)) . '" ' . $thumbcode . ' >';

if I link it this way:
$out .= '<a href="'.'nggshow.php?pid='.stripslashes(nggGallery::i18n($picture->pid)) . '" title="' . stripslashes(nggGallery::i18n($picture->description)) . '" ' . $thumbcode . ' >';

it goes to https://website.com/goto/nggshow.pic=12 but it doesn’t exist

do you know how to avoid goto and make it works??