Error while trying to run project: *RESOLVED****

When starting my project I get the following messagebox.
Which by the way only just started since I changed permissions because the localhost was asking for a username/password when a certain page was accessed. I followed the help and Integrated Windows authentication is already checked.

Messagebox Error:
Error while trying to run project:Unable to start debugging on the web server.
Debugging failed because integrated Windows authentication is not enabled.Click Help for more information.