Unable to run "HelloWorld" Azure sample in Development Fabric

I am trying to run the sample "HelloWorld" Azure application in the Development Fabric on my Windows 7 development machine. It compiles successfully, I can see it start up as the "Windows Azure Simulation Environment" appears in the status bar and when I bring up the DF UI I can see that a HelloWorld_WebRole is running but I get the following errror message in my browser:

Server Error in Application "ROLE SITE"

Internet Information Services 7.5

Error Summary
HTTP Error 404.17 - Not Found
The requested content appears to be script and will not be served by the static file handler.

Detailed Error Information
Module: StaticFileModule
Notification: ExecuteRequestHandler
Handler: StaticFile
Error: Code 0x80070032
Requested URL: http://127.0.0.1:5100/Default.aspx
Physical Path: C:\Projects\Azure-samples-cs\HelloWorld\HelloWorld\bin\Debug\HelloWorld.csx\roles\HelloWorld_WebRole\approot\Default.aspx
Logon Method: Anonymous
Logon User: Anonymous

The error message goes on to say that the most likely cause is that:

The request matched a wildcard mime map. The request is mapped to the static file handler. If there were different pre-conditions, the request will map to a different handler.

Ok, I reproduced your exact error ... by disabling Asp.net on my machine.

Make sure you have Asp.Net enabled: 1. Start button 2. Control Panel 3. Turn Windows features on or off 4. Under Internet Information Services/World Wide Web Services/Application Development Features 5. Check ASP.Net 6. Click OK

Try Hello World again, it should work.