Unfortunately I don\'t have a whole lot of information on this. I have a customer who has moved their site from an ancient system to IIS7 on Windows 2008 Server. Info about
Spent a bit of time with something similar. Even with the correct settings it wasn't working.
I then tried create the actual file first on the server. Turned out to be the trick that worked. Now my ASP page writes to the existing file no problem.
Must be something about creating a new doc from scratch that is another issue.