C# Fax Application

Hello

I have written a C# fax-application, on a Windows XP
machine(machinexp), that uses a shared FAX-modem on a Windows 2003
box(machine2003). However when I try to make a C# WebService to do the
same it fails.

So, I know my C# application works on its own, what I subsequently did
was made a shell webservice application that essentially called my
original C# application and it still failed.

- WebService (trying to connect to machine2003-fax)
Error: The fax server API version does not support the requested
operation

- WebService - calling the C# application
Error:The fax server API version does not support the requested
operation

So what am I doing wrong? Is this a permission issue, or am I missing
something.