EXS 24 Logic Sampler Users Group

I've just got the Peter Siedlaczek advanced orchestra set of 5 CDs in 
gigasampler format. When I follow the directions and copy the files 
from CD to the "sampler instruments" directory, all of the files copy 
over OK, but when I click on the menu (AFTER CLICKING "REFRESH MENU")
approximately 2/3 of the sounds do not even appear on the menu.

I have taken this matter to the top of Emagic support in Australia, 
who claim there is no incompatability problem.

The other 1/3 of the files convert to EXS format, but without any 
ability to use the giga XFD function on the mod wheel.

Has anyone had this problem with this product? Has anyone got AO to 
work converting from giga?? Am I going nuts over a simple thing I 
missed?

I am using a powermac G4 twin 1.23GHz with 1 Gb ram and Logic audio 
platinum V5.5.