Is it an Intel mac, I assume it it. Unfortunately in the current release of Jaikoz the acoustic id matching does not work correctly for Intel macs and is disabled, (it does work for Power PC Macs) - this is clearly stated at the top of the details for the new release (http://www.jthink.net/jaikoz/jsp/news/start.jsp) but apologies if you didnt see this.
This really is a temporary measure due to circumstances out of my control, I have been waiting for some software to be released for Intel macs since early December by MusicIP. I always like to provide identical functionality on all platforms but the delay was getting too long and I needed to do a release for the other platforms, I am confident this problem will be fixed within the next two weeks. In the meantime your license will work with Jaikoz 1.3.1 ( (http://www.jthink.net/jaikoz/jsp/download/start.jsp, selected the Mac OSX 10.3 link) and that does acoustic matching using the older method which is not as accurate but still works well