[Koha] Search error

Hi all I am running koha2.2.5 on fodero core 5, the version of mysql is mysql-5.0.22-1.FC5.1. I add a biblio through Z39.50 and add 2 items. but when I try to search the biblio, I get 2 results without title and author(see the attached screenshot). I have modified search.pm and searchmarc.pm . Can anybody help me? Thanks Jenny