EXS 24 Logic Sampler Users Group

Hello, I am using Logic Audio 6.3.1 on a PowerMac G4 running OSX 10.3.3.
  I got the big box. When my trial period ended for the exs24 ended I
assumed I could use the exsp24. I can't get ot to play any samples. They
load but all I here is the same synthesizer sound no matter what sample
I load. Can anyone tell me what I am doing wrong? Thanx. Joe.