Open Source Document Management System | OpenKM

I am creating Roles and assigning users to newly created roles. When users assigned by new roles tries to log in they are not logging in. When i checked the log as admin in OpenKM administration section there is listed SESSION_CREATED and at the same time SESSION_DESTROYED is also listed.
What will be the problem and how to resolve this problem?

All users MUST HAVE ROLE_USER to be able to login to OpenKM, so add this role to your users.

I have created a new role say ROLE_SALES and assigned users to this newly created role. But when users assigned to this role tries to log in, log in fails and it is showing general_error.jsp page without showing any exception. When I check log for the user in admin section it is showing two operations: SESSION CREATED and at the same time SESSION DESTROYED.

Any users should have ROLE_SALES and ROLE_USER.