Hi, there is a typo in your users query: anonymous wrote : select passwd from users username where username=? Your "jboss-web.xml" uses an incredibly old dtd, better use a newer one: <?xml version="1.0" encoding="UTF-8"?> | <!DOCTYPE jboss-web PUBLIC | "-//JBoss//DTD Web Application 5.0//EN" | "http://www.jboss.org/j2ee/dtd/jboss-web_5_0.dtd"> | | <jboss-web> | <security-domain>...</security-domain> | </jboss-web> If this does not help: activate logging of the security layer. See the sticky post "FAQ ..." in this forum, question 3. By the way, as you are from Germany: http://www.informatik.fh-wiesbaden.de/~knauf/KomponentenArchitekturen2008... Best regards Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4226904#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...