EXS 24 Logic Sampler Users Group

Hi there. I'm running logic 6.3.1 on os9.2 and I have a problem with exs24 where with 
certain sampler instruments the exs cant find the corresponding audio files, even 
though all the files it needs are present in the exsamples folder on my powerbook 
int.hd. 

Does anyone know how to direct the exs to look for these files?Have tried everything i 
can think of.

Thanks

Dan G.