[xwiki-users] Searchs only work for the Administrator user

Hello, When the Administrator does a search on my wiki, everything works fine, but when any other user does a search, it doesn't show any result (and the pages that should appear, all the users can read them) If I don't make login on the wiki and do the search, it doesn't show any result. If then I log-in as the admin, the search result page show the correct results. Is there any configuration regarding privileges on searchs that I've missed?? Thanks a lot Sergio Carrasco