EXS 24 Logic Sampler Users Group

I've downloaded all the material from all volumes at ftp:akaipro 
and converted to exs24 using CDXtract. Everything works well, except 
for the 256meg piano. The samples sound fine on their own, but only a 
few in the lower register are working with the the EXS. I tried 
James .exs data as well but I had the same results. Any suggestions?
                  Robert