Http 404

[askldrp80]

my webpages run on local server but it gives error online like
Server Error in '/' Application

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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: /default.aspx

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Version information: Mono Runtime Version: 2.6.1 (tarball Sun Jul 11 18:32:05 EDT 2010); ASP.NET Version: 2.0.50727.1433

[toyowheelin]

What is the question here? Looks like the server cant find default.aspx, how have you configured your server?