Particle through Geometry

[ossossso]

Hi everyone!
Sorry but now I've a different problem :)

I've modeled a geometry into Maya and animated and deformed it using a lattice, then I've exported it into RF4;
I've put an emitter inside the geometry and I've made the geometry full of particles; then the geometry starts to move and at a certain point the mouvement is fast enough and particles exit from the geometry, and it shouldn't happen;

I've selected the geometry and into the parameters I've put "collision distance" at a pretty high value, while "distance tolerance" and "collision tolerance" are both at Zero, I've tried using Sticky, but nothing; I've tried also increasing substeps values, but no results.

there's maybe any other way or parameter that could help me? Or I have only to reanimate the geometry in a slower way?

Thanks a lot for any advice.