If you can't solve this might I recommend the free app, PoseRay, for 'breaking' objects up into their material parts.  My tests of it [PoseRay] using TG2 which often needs the breakup for the same reason have all worked well. If you need coaching in PoseRay either Site mail or e mail me at  bobbystahr@renderosity.com

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again