Hi..the problem is that im doing a DataBaseManagerImpl.java that connects to the hypersonic database, i made a web interface too, the App.ear is in server/default/deploy and works fine until I try to use this following method in the DatabaseManagerImpl.java: private Connection getConnection (){ Connection conexion=null; String URLConexion = "jdbc:hsqldb:hsql://localhost:1701"; try{ Class.forName("org.hsqldb.jdbcDriver"); }catch(Exception e){System.out.println("Error loading HSQLDB JDBC");} try{ //Properties pr = new Properties(); //conexion = DriverManager.getConnection(URLConexion,pr); conexion = DriverManager.getConnection(URLConexion); }catch(SQLException e) { }; return conexion; } When I try to use a method that use getConnection() JBoss throws an Error that says Error loading HSQLDB JDBC..but the hsqldb libs are already in the jboss3.5.2/server/default/lib..they are hsqldb.jar and hasqldb-plugin.jar...could you help me??..could it be that hsqldb has another jdbc libs?? thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3994275#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...