From: Randall Parker 

Commenting out two sections of web.config fixed my problem. Got the answer here:

http://forums.asp.net/1082874/ShowPost.aspx

The project can be started without debugging, but it doesn't appear to do anything?
Right-clicking on the WebForm1.aspx and selecting 'view in browser' gives
an authentication error, easily fixed by commenting out the authentication
line in the
Web.config file. Similarly, the whole of the sessionState block needs to be commented
out.


Randall Parker wrote:
> I managed to create and compile a simple aspx source file from VS 2003.
> When I try to access it thru the Cassini web server from my web browser
> on the same machine I get this below. Anyone know why?
>
> Originally web.config was
>    
>  and had the same error. But I tried editing the web.config file line 46
> to "None" and that didn't help. They mention IIS in the error message.
> But I'm not using IIS.
>
> http://localhost/WebApplication1/DeviceUpdateStatus.aspx
>
> Server Error in '/' Application.
> Configuration Error
> Description: An error occurred during the processing of a configuration
> file required to service this request. Please review the specific error
> details below and modify your configuration file appropriately.
>
> Parser Error Message: It is an error to use a section registered as
> allowDefinition='MachineToApplication' beyond application level. This
> error can be caused by a virtual directory not being configured as an
> application in IIS.
>
> Source Error:
>
> Line 44:            by Microsoft that offers a single logon and core
> profile services for member sites.
> Line 45:     -->
> Line 46:     
> Line 47:
> Line 48: