Hi again! Since my post I was searching an answer to my problem, and doing my research over the jdbc mysql driver so I can get some answers. I was getting that error and I thought the problem exists because the database (MySQL) was using latin1 charset, then I changed the charset to utf8 and the problem was solved. To get a conclusion I changed back to latin1 and the problem "doesn't" exist. So I don't know what happened!! Thanks anyway. Tiago Cavaleiro. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4043622#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...