sebastien ferrand [http://community.jboss.org/people/microbe] replied to the discussion "Connection problem to mySQL database" To view the discussion, visit: http://community.jboss.org/message/534117#534117 -------------------------------------------------------------- Thanks for a such response, but it doesn't work yet. I tryied your solution, and it doesn't work, there is a problem in connection in these two lines : DataSource ds = (DataSource)ctx.lookup("java:MySQLDB");  // Name used in *-ds.xml file Connection con = ds.getConnection(); ds contain "org.jboss.resource.adapter.jdbc.WrapperDataSource@109afb8" I substitued MySQLDB by the name in the xml (which is MySQLDB =] ) Where the problem may come from, maybe I forgot an important step... -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/534117#534117] Start a new discussion in Datasource Configuration at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]