Hello,
Yes, I was sure to create a Software Instrument track and assigned the Ivory AU plugin for that track. I didn't have that latest version you mentioned. Just went to Synthogy's website and downloaded the v2.11 version, installed it succesfully, restarted computer, and still no sound. I tried using Ivory in standalone version, and there was no sound here either—the menu of the different pianos also disappeared. This was especially strange because just yesterday and earlier today, even when I couldn't find Ivory within Logic, it worked perfectly in standalone version. Attached is a snapshot of the window I get in Ivory when I tried selecting a piano from its "Piano Keyset menu:
To briefly explain, I'm a concert-pianist and composer. I use the computer mostly for work with Finale software and only recently have started using Logic and Ivory. My hunch, therefore, is that there's something I'm not doing right which is causing these problems since I'm not yet fully versed with those two software. If only to find out what.