[Koha] BookSelf

Hello All, I have installed Koha-2.0.0 and modifying the parameters in the Intranet pages. At the Circulation, where there is a Virtual Shelf, I can add in many Book Shelf ie, Mathematics , Physics .. etc., but then when I try to add a book into these book self, it does not work and all of these book selves show "0" number of book. Please help by advise on what to do, thank you very much. Regards Minh __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail