I use SMF forum bridge , from this time I can't use xp publish : there is no error, files seems to be uploaded, BUT nothing in my gallery : it's just like there is no new picture .
Could help ?
Sorry for this post, I have found the solution : It seems the upload parametres , image size apply also for xp publish (I though thoses parameters didn't apply to administrator) .
So for the ones like me who have encouter difficulties to up upload, check first image size allowed of pictures... ;)