[Koha] need help

Hi, I have installed Koha 2.2.4 in my library but i have some problem in accessing the following sections 1. Add Authority error message:- this page is opend with erros and the page is blank kindly let me know about the thing 2. when user whant to log in to his account through the OPAC when he enters the card no and password it says incorrect password help me in this regard thank you. -- Jayadev Kumbar, Librarian, GCI Solutions Pvt Ltd, Bangalore