TVDB don't find all seasons

Hi all:

After installing openelec I started scanning my library.

Everything is fine with movies and Universal movies scraper, however with TVDB for tv shows sometimes It shows only one season when the folder contains 2 or 3 seasons.
And also in one case where there's only one season the scraper find artwork for the show but as content it shows " 0 watched 0 unwatched ".

Same library (it's on a server) scanned through a XBMC installed on a windows machine works great !!!

any ideas please