I'm using file.copy to copy a file in an ASP.NET web site. Obviously this is running server side. Odd thing is that when I run the web page from the web browser on the server running IIS the copy works fine but if I run the same web page from a browser on another PC the file copy fails with 'Access Denied'. I am logged in under the same domain user on bother systems.
IIS is configured to use Integrated Windows Authentication. Any ideas where to look next?