Did you type the URL directly in? For example
www.mywebserver.com/index.aspx if that works, then the reason you aren't seeing your page by just typing
www.mywebserver.com is because the page name hasn't been added in in IIS. Go into IIS, locate your website, right-click, go to properties click on the documents tab go to add and add your document "*mypage*.aspx". If this doesn't solve the problem, could you please go through the steps you did in order to publish the site on your web server, usually, you just:
go to Project>copy project
type in your url for your web server
Use frontpage web access method
Copy only the project files needed to run this application
if that doesn't work, could you please explain what method you used in publishing and the exact error.
Hope I helped
Slade