So now I think I know what was the problem. Problem was in my class that extends AbstractServerLoginModule. In method login() i didn't use super.callbackHandler at all. When i did - promlems were gone :-). But still i have one tiny problem. I just want to pass one extra parameter to LoginModule through InitialContext environment params. Now i have my own Callback, that implements Callback interface... But in login method i have an exception: UnsupportedCallbackException. Even when I'm trying to logg in with LoginContext - the same problem. piotr.koper View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4089287#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...