;;;It is a stranger thing to me because I can browse any .html file in in my IIS server.
This is not strange, html pages do not use IIS. Any machine with a browser can view html pages - no web server is needed.
Have you carried out shahchi1 advice? This will go a long way to solving your problem.
;;;Simply open that page in Netscape browser
Do people still use NS?
What do you see when you go to:
http://localhost/localstart.asp
Wind is your friend
Matt