I think I got a solution. Check your PC system time & your TOMCAT server system time. If your TOMCAT server system time is much forward than your PC system time. The server will always run the server
JSP copy (old copy) because PC JSP copy is much earlier due to the timestamp checking by TOMCAT server.
Assume that development is done on PC & download into TOMCAT server to compile.
Anyway, thanks a lots, folks
Bye-bye.