>>Are you using XP/IIS? The message you are getting is usually associated with an IIS configuration. Check to make sure that the vistual directory is configured as an application (IIs Manager -> Websites -> Right Click on the virtual directory for your app, make sure that application name is not empty). Click on the Configuration button, go to the debussing tab and check the top-most checkboxes and send detailed asp message to client. Click OK
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>>Then go to the directory security tab, and edit your authentication Method button (top section) and make sure the top check box (anonymous access) is check AND the bottom one (Integrated Windows authentication).... OK, back to the OK out of all the windows and try the debugging again...
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>>The process is very similar on 2003/IIS.
>
>You got it! Thanks Ric. The Integreated Windows authentication wasn't checked.

Glad could help!