I'm not sure what was up, really, but I've got it working now. I had to try various versions of fssound.dll, though. I downloaded three different ones from FS sites - and one from a dll site! They weighed in at variously 5 kbs, 11 kbs, 15 kbs, and 255 kbs... I tried them all. I'm curious as to know why the 11 Kbs version didn't work for me. That's the version I used in my last install of FS - and what I used in this install up until this week - but even replacing that with a newly downloaded copy didn't fix the problem. I ended up using the 5 Kbs version...