>If I run without debugging it throws an error in win.config at the line
>
>authentication mode="Windows"

If there is an error in your config file, the app will not start at all, debug mode or no. You have to get rid of this error.

>Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS.
>
>How do I interpret that?

Well, it may be a remnent of your config problem. Probably is. However, if you look in IIS manager and look at your virtual directory, does it have a little open box icon, or is it just a folder icon? If it is just a folder, it is not set up as an 'application'.

BOb