EXS 24 Logic Sampler Users Group

I've converted my Roland and EMU CD roms to .EXS+.WAV , using 
CDXtract on a friend's Windows PC. Now I'm trying to play the sounds 
in my EXS24 on a MAC. I've placed the .EXS files in the Sampler 
Instrument folder along with the corresponding .WAV samples and that 
didn't work. While leaving the .EXS files in the Sampler Instrument 
folder, I then tried the .WAV files in the EXSamples folder,the 
SoundFont Samples folder and finally, the AKAI Samples folder. Still 
no sound. I've noticed that the files for  sounds that are working in 
my EXS are all lower case. (.exs and .aif or .wav)The files that were 
created on the PC with CDXtract are all upper case. (.EXS and.WAV) Is 
it possible get these sounds working in my EXS24?
      Thanks,    Robert