I agree with fastedge. If you want to use index.asp as your default landing page then you need to make sure that the Web server is configured correctly for this.
Also, not all Web hosting is the same. If you are on a Linux server that is using Apache and ChilliSoft for ASP then you will need to modify your .htaccess file with a line as follows:
DirectoryIndex index.asp
If you are on a Windows server using IIS then they prefer the term default.asp and you may find that index.asp will need to be added manually in the appropriate tab. This is not hard to do and you can ask your hosting provider for assistance.
One last point, you can always test your page by typing in the exact page in the URL field. So instead of typing in
www.mydomain.com
type in
www.mydomain.com/index.asp
What this does is allows you to see that the page is in the right place and loads OK. All you need to do then is have your hosting provider help you change the default to this page.