[Plugin: NextGEN Gallery] Permalink with Post Type

so, i get the nextgen galler 1.5.5 running on a wp 3.0, and one post type named portfolio, when i enable the permalink function on nextgen, the album doesn’t work anymore, but when i disable the permalink function the albuns works again.
without permalink they look like this:
http://mysite.com.br/portfolio/post-title/?album=1&gallery=1
with permalink they look like this:
http://mysite.com.br/nggallery/post/post-title/album-1/gallery-1

they don’t show an error 404 page when i enter the album, they show only the cover of the album, nothing more than that