"Page not found" when clicking on a username

[spotlight2001]

I have just installed question2answer 1.8.5
and installed latest Q2A-User-Manager

When I am in the user manager, this is my url:
http://www.somedomain.com/qa/index.php?qa=admin&qa_1=users_management&page=1

When I click on some user I get "page not found" with this url:
http://www.somedomain.com/qa/index.php?qa=user&qa_1=admin?state=edit