Hmmmm. Shouldn't be a Java function, I don't think. My guess is that you somehow changed the security settings or other options on your Internet browser, Barbara. Poke around on your menus and see if you can find something up there. Also, you may want to check the Cyber Hymnal and see if you can get their MIDI tunes to play.
Also, I wonder if you need to reinstall whatever program plays MIDI files for you. If you double-click on a MIDI file that's on your hard drive, does it play? It's one of those things I could fix in a minute if I could look at it, but I can't see your computer from here - but I can tell you for certain that the MIDI tunes in the database are functioning normally and that the problem is ALL YOUR FAULT!!!!.
Good luck, Barbara.
-Joe Offer-