[rules-users] role based authentication in tomcat

Hi, I configured my guvnor in tomcat 6.0.It is working fine with out any user name validation.now i just want to create a role and give permission to that role. In the components.xml i have changed like the below configuration <security:role-based-permission-resolver enable-role-based-authorization="true"/> <security:identity authenticate-method="#{authenticator.authenticate}" jaas-config-name="brms"/> now where i need to create a role with that name "brms" and where i need mention the username and password. i tried in the tomcat-users.xml but it is not working. could anyone please help me.. regards, Vamsi Krishna.Kavuri. <http://www.brainyquote.com/quotes/authors/g/gilda_radner.html>