If you're ever trying to get a website to load properly in IIS 6.0 and you keep seeing this:
"Server Application Unavailable
The web application you are attempting to access on this web server is currently unavailable. Please hit the "Refresh" button in your web browser to retry your request.
Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur. "
In your browser, followed by an event in the application log that starts with this:
"Failed to initialize the AppDomain:/LM/W3SVC/1/Root"
And you're using the Network Service account to run your worker process here's some steps that should get you up and running...
1. Ensure that you've granted the Network Service the "Local Launch" and "Local Activation"permissions. (Component Services -> Computers -> My Computer -> DCOM Config -> IIS Admin Service -Right-Click-> Properties -> Select the Security tab, and set the permissions)
2. Locate the file system directory that you've mapped to the IIS virtual directory and edit the permissions to grant at least Read & Execute, List Folder Contents, and Read to the IIS_WPG account.
Make sure the worker process is running and then try again. With any luck your application will display in the browser properly!