Unable to start debugging on the web server. You do not have permissions to debug the server.

30 06 2009

Today I was encountering this problem, it would appear that its kind of hard to re-create but in the event that you are running domain websites locally on your machine you use what is called a “Loopback Check”. Not quite sure excatly what the check does, but during that process you will lose your authorization to debug a web application.

In order to fix the problem I located a thread on the Microsoft Support website with two available options. For me I added the domain name of the website that I’m referencing locally to the registry in MSV1_0 under a new Multi-String value called BackConnectionHostName; in this case: local.feature.somesite.com and it worked like a charm!

For more information on how to resolve this issue please visit: http://support.microsoft.com/kb/896861