I checked the MS Knowledge base and am correctly set up according to them.
After a fresh reload of Windows XP, it worked fine. It has since stop working and I can not relate the stoppage to any particular activity on my part.
I've reloaded Internet Explorer 6.0, but the problem persists.
I can Send A file from Windows Exploer OK.
I am using Outlook XP and an Exchnage server for my Email.