[xwiki-users] clean install xwiki , without default xar add users

Hi, i have installed clean xwiki enterprise 1.3.1 using tomcat as container mysql as database, everything working fine. How can i now add users? I can acess administration menu without problem , but adding users just not work (Internet Explorer on Windows Vista SP1). It is some kind of my error (see nothing in xwiki.log or catalina.log) ? Or i am doing something wrong? Thanks! D.