Don't know what the issue could be, but I would try:
~/Library/App support/Reaper/User plugins/
MacBook Pro 15" i5 mid'10, 8GB, latest OSX, latest 32bit Reaper
MOTU Traveler mk3 (+ADA8000), Focusrite Saffire Pro 24 DSP
Focal Alpha 65, Focal CMS 40, iPhone 5, *Registered Reaperer*
Last edited by mrelwood; 03-09-2012 at 05:03 PM.