It was my server--works on a different one
Thanks for the info. It turned out to be my server--I tried on another server and it works perfectly.
(Oh, and what a treat on your link: Jimi Hendricks on acoustic guitar and looking young and happy and healthy.)
Now to try to understand why and how it works. It was easy to use Necromanthus' player--I just called the files the way he wanted them. But that doesn't mean I know what I am doing. I hope someday I will at least be able to load files no matter what they are called!
Nothing beats trial and error and the kind help of folks here on the forum. Flash, Swishmax, and KM elude me because they use a different paradigm from the one I first learned--BASIC and Comal on a C64. I used to just print out the program listing and lie in bed reading until it all made sense. That's not so easy with KM because the code is not all in one place and a lot of it is not visible. But back then the bulletin boards were at 300 baud, so getting help was a tad slower.
Thanks again for all your help!