Hi there

I've written a web service that uses the fax service to send a fax. It
works fine with text files, but returns the error "The data is invalid" when
trying to send a PDF file (it takes a couple of minutes to return this
error). I get the same error for Word documents.

I've watched Task Manager while the web service runs and I can see an
Acrobat Reader process start. Given that the code in the web service runs
fine as a Windows App, I was wondering whether the problem was with the IIS
process running Acrobat Reader, but not being able to interact with the
desktop.

I changed the www service and the fax service to allow them to interact with
the desktop, but that hasn't solved the problem. It's interesting that text
files work (which I assume is using Notepad to create the fax file).

Has anyone been able to send faxes from a web page using a PDF file?

Thanks for your help.

Craig