Three things to your attention: 1. Rename the table from User to anything else (i.e TUser) while on different databases this might be a reserved word (i.e. Oracle). 2. Remove the constructor or replace your constructor with a default constructor with no args. 3. For maintaining the state of a logged in user use a business method like public User doLogin(String user, String pass). With this code you can find the user to log in by using your correct query. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4156742#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...