"resource not found" error

Hello
I am just beginning ASP.NET and i created a sample page. I am using the book "ASP.Net using VB.Net". when i type in the url i get the error

--------------------------------------------------------
Server Error in '/5040' Application.
--------------------------------------------------------------------------------

The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly.

Requested Url: /5040/punctual.aspx


--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573

am i doing anything wrong...or may be not doing something..

please help

viv