Guitar Rig Problem?

Hey,

Guitar rig is working fine for me as a stand alone application,

however when i use it in Logic as a plugin, it doesn't work, any ideas?

Im using a MAC with logic Pro 9 and a focusrite saffire pro 40 interface, im sure i'll have to change a setting within logic or on the interface but unsure what exactly.

Thanks for your help

Have you tried this:
https://discussions.apple.com/thread/3349071?start=0&tstart=0

I don't have Logic or Guitar Rig...