[Koha] remove data

Hello all, I have load data with success into koha catalog. Now I would like to remove them, I go to managed staged records ANd then I click UNDO IMPORT INTO CATALOG...but job stay at 0% I have miss some thing? Thanks -- Luis Diaz PIC (Port d'Informació Científica) Campus UAB, Edificio D E-08193 Bellaterra, Barcelona Tel: +34 93 581 33 08 Fax: +34 93 581 41 10 http://www.pic.es Avis - Aviso - Legal Notice: http://www.ifae.es/legal.html