Sample memory not available - HELP!

Out of the blue, one of my VST’s Spectrasonics Trillian (bass module) is not letting me load samples. I don’t have much else running and never got this error before. I have plenty of memory.

Can anyone help me troubleshoot this?

" Sample memory is not available (0.00gb). Before loading again, use Lite version of Patches, or decrease pre-load memory size on System window, or clear un-used parts"

I’m running

Mac OS X 10.6.8
2 x 2.4 GHz Quad-Core Intel Xeon
Memory: 6 GB 1066 MHz DDR3
Cubase 7.0.2

thanks for your help!