Visual InterDev
The debugger could not read the current debugging settings for the Microsoft® Internet Information Server (IIS) application. This can occur if the server becomes unavailable during the debug setup process. Verify that the server is running, and then try starting the debugger again.
Do you want to continue launching the debugger? If you choose Yes, you can view the file in the debugger and in the browser, but will not be able to debug.
For details about server debugging options, see Debugging Server Script. For information about manually enabling debugging on the server, see the topic "Enabling ASP Debugging on the Server" in Troubleshooting.