Bcc8 text extruder not interacting w/ 3d layers?

First time using Bcc8 text extruder in AE cs5. Boris claims "precise interaction" with other 3D layers. But how about intersection? I'm getting neither..
I've applied Text Extruder to a 2D solid, placed at the very top of timeline, yet interaction with other 3D layers is definitely a bit off. And it doesn't intersect with 3d layers? I really hope I'm wrong. I need my bcc layer to intersect/interact with other 3D layers (below and obove it). Anyone with a suggestion? Thanks.