so you really need to create a role in your tomcat-users.xml called admin
eg.
and then a user with admin role eg.
and the same thing for the manager role
and then you can either create a new manager user or just add manager role to the admin user eg.
but Bill is right before you go any firther do some reading up on Tomcat and how to configure it etc. you dont want to open your web server to problems :-)