First sorry for my bad english, i hope you could understand me

I installed the module facebook comments for phocagalery.
It's working great for gallery.
My problem is when i want to comment a single picture and not a gallery, the picture never been display and the link in facebook doesn't work.
For example :
if you go there : http://www.squashpetange.lu/index.php?o ... 0&Itemid=2
you will see the facebook comments in the bottom and there is no problem with them. the comments are working and the link in facebook is working too.
but if you clic on one picture in this album, you can't add facebook comments.
Same, if you clic on the facebook comments icon under the pic, a window will open with the facebook comments but without the pics. and if you add a comment, the facebook link doesn't go to the pic.
Another things, if i enable the option "Display Comments in No Popup Window",i have an error message "You are not authorised to view this resource."
I hope I have been clear enough
Thanks