Hi, I'm learning JSP using Jbuilder3.5 Enterprise. when I run my sample codes from the localhost builded in Jbuilder, it come out following error: Method setAttribute(java.lang.String, java.lang.String) not found in interface javax.servlet.http.HttpSession. session.setAttribute( "theName", name ); is there anything wrong with the code ? or some limitation of Jbuilder3.5 ? Pls help...Thanks a lot!