An error occurred on the server when processing the URL.

If you receive this error message from IIS7 on Vista:
An error occurred on the server when processing the URL. Please contact the system administrator

Do the following at the IIS Manager to get a more meaningful message:
1. Select the web site from the tree on the left and click on the “ASP” icon
2. Expand the “Debugging Properties” and set to true the “Send errors to browser”

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