Just to clarify...
If I try to use any .xspf file with the url http://myhost/myfile.xspf it does not work.
Files that work on another server will not work when they reside on any of the servers that I have access to. For example, if I try http://webjay.com/myfile.xspf - it works. If I copy the exact same file to http://myhost/myfile.xspf it does not work.
weird!
--David