[Plugin: NextGEN Gallery] Gallery not showing

I am using Gallery and I hope to be able to do a “super simpler” gallery but it is just not working.

I would like to do
http://nextgen-gallery.com/gallery-page/

but I keep having what you can see here: http://www.contentgeeks.net/the-content-management-comic/

About wordpress, in my page I use: [imagebrowser id=1], I also tried [nggallery id=1]
About gallery settings, I use
Integrate slideshow disabled
and nothing specific

nothing changes 🙁

any idea?

http://wordpress.org/extend/plugins/nextgen-gallery/