EXS 24 Logic Sampler Users Group

I just installed "East West Quantum Leap RA" VSTi on my PC, with a 
Logic 5.5.1 host. When I launch Logic, it quits at loading VSTi RA! I 
am able to launch the stand-alone program of RA, and also able to laod 
other East West QL VSTi's in Logic.
Can anyone help me with this?
cheers...