I developed a enterprise application . my web functions are about update each row on the table . after clicking button to update , the table is updated successfully , but when i find that username again , that's still the old value . I think I haven't updated bean yet ? (is there anything to do after using get() , set() methods to updated ? ) . I'm using CMP Entity Bean , and Session Bean . on Netbeans 5.5.1 , EJB 2.1 .Please help me.