Cant see in ADMIN page in adv. poll

Dear all:

Thanks for your help first

I can use Adv poll a long time ago, in these few day, i reinstall my linux server and restore the adv poll mysql database and conf file.

After i restore it, i found it can display all the poll , but i never enter into the admin page. I just see a blank page when i enter in admin. I try to install the adv poll but it still have this problem

Last server: php 4.3.0+apache2.0.45+mysql3.23.56

Recent server :php4.2.3+apache2.0.45+mysql3.23.56