XWiki instalation - can't log in

Hi, I'm trying to to install XWiki in my Debian Linux (Tomcat 5.5 + PostgreSQL). I followed the instructions and eventually got things to work - or almost. I can see the WebHome wiki but I can't log in neither with the administrator account (Admin/admin) nor with the users accounts (some_username/equal_password). I list bellow the log errors I get in Tomcat. Does anyone have a hint? Thanks, Luiz Celso 13:30:14,075 WARN http-5080-Processor25 RequestUtils:createActionForm:177 - No FormBeanConfig found under 'login' 13:30:14,107 WARN http-5080-Processor25 http://www.thatismydomain.xxx:5080/xwiki-0.9.840/bin/login/XWiki/XWikiLogin?... RequestUtils:createActionForm:177 - No FormBeanConfig found under 'loginerror'