[xwiki-users] adding users do not work

Hi i have a xwiki enterprise 1.4milestone1 installed , using tomcat as container mysql as database backend. My xwiki is working great, but adding users is not working at all. I also imported default xar file to have "basic demo" data. When i will log as Admin, with pass admin , and click on Users -->Add New user, i will add all credentials and then save, but nothing will happend, There is simple no user. Where is the problem? Thanks! David