Just installed Logic platinum 6 OSX panther using audio units for audio inst. plugins. When I open a Logic 5 song which was done in OS 9 with VST audio instruments, they (audio instument insert slots) show up marked out and will not open. I have not installed Logic 5 yet on this G5. Is that necessary? Seems like they should just convert and open. All of the same plugins have been installed in OSX and work great in "new" songs constucted in Logic 6. So how do I get Logic 5 Plugins to open in Logic 6?