The relocating of our web site to a new server continues apace, and I've run into yet another frustration. I am generating a XML Formatted Data File (XFDF) which merges data provided by a web user with an Adobe document and serves up the result. This works just fine on the old site, but IIS 7 returns a 404 error on the new site. The file exists, and it is formatted properly: I can generate the file on the new site and it works fine when copied to the old, and I can generate the file on the old site where it gets served, copy it to the new and get the same error. I can copy the URL to the PDF and that works on both sites.
The problem seems to be that IIS is finding the file but not serving the request. I cannot see any place on the old system (IIS 6) that explicitly allows XFDF files to be delievered: there are no HTTP filters, no explicit declarations of MIME type, nothing.
Any suggestions on how I can get this fixed?