We use the UPSXML module and the documentation with it and in the Wiki is spot on.
Just be sure you copy the correct files to their correct location (documented).
When I installed, I got cross-eyed and crossed up a file with same name but different paths (so, actually different files), I mistakenly put catalog/admin/includes....file where catalog/includes/... file should have gone.
When I reversed them to where the docs said to put them, it worked fine.



