EXS 24 Logic Sampler Users Group

I'm using EXS 24 on Windows 2000 for Logic Platinum 4.8.  I also have
Protools TDM mix 5.1.  I've tried several attempts to get exs to look
at  the digi hardware, but to no avail.  Later, I bought a
soundblaster card.  When I load a sample from the Miroslav Master set,
I get alot of clicking distortion, like digital clipping on some of
the keys.  I've tried all kinds of latency settings, but nothing.  I
don't think it's a computer issue, considering I have 933Mhz w/ 768 of
RAM.  Has this happened to anyone else?