“Unable to start debugging on the web server. You do not have permission to debug the application. The URL for this project is in the Internet zone.”

I got this message when trying to debug an ASP.NET application in VS.NET 2003. Naturally it surprised me as i had not seen it before and was always able to debug my apps. It turns out that installing IE7 changes some of the security settings and so here is the steps below to fix the above error.

Fix:

1. In the Internet Explorer, “Tools” Menu, select “Internet Options”.

2. Switch to “Security” Tab.

3. Click on “Internet” (The Globe Icon. Its actually the default selected).

4. Click on “Custom Level” in the bottom.

5. Scroll down to find the “User Authentication” section.

6. Select “Automatic logon with current username and password”.

7. Click “Ok” twice to exit.

Found this on Harish Ranganathan’s Blog.

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