Most of the 'translations' out there are the completely different words attached by tin pan alley to the old tune about the funicular railway. That is why you can't match it.
What you put down, Sue, is just a slight variation on what Ghirotondo posted above in 2003. We haven't seen a translation yet.

I seem to remember a site which did have a good literal translation so check Google for Funiculi. The websites for Naples may have it so check them as well. Or someone here may have it and post later. Please ignore unhelpful guest.