Can't ignore collisions in callback

hi, I'm trying to make some trigger zone using materials and boxes spaced about the level. At the moment you can run into the box but you actually collide with it. I understand that if I return 0; from the userBegin and userProcess then that should ignore the collision? It doesn't seem to, and I know it's being called because I have log messages inside them.
Anyone made simple trigger zones that can paste a bit of code?

this is all mine is at the moment

int callback_lapMarker::userBegin(){
// TODO see if using this AABB test is faster and ignore the poly vs poly test.
// - might not be accurate enough (is AABB or OABB?)
return 0;
}


int callback_lapMarker::userProcess()
{
log("*** MARKER TRIGGERED ***");
return 0; // return 0 for no collision, only collision detection
}


if you return 0 from userBegin(), userProcess() should not even be called... can you show where you setup your materials in your code?